Assign groups to condition 1 and 3 only


Assign groups to condition 1 and 3 only

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bkorsmo
bkorsmo
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I am running the Racism IAT which is counterbalanced between even and odd group numbers. I need to run subjects through the odd numbered, target compatible 1st, target incompatible 2nd,  every time. How do I run group numbers 1 and 3 only?

I am scared to alter the Racism IAT script and do not how to perform URL parameters in Inquisit Web to assign group IDs.

Is there an easy fix? Help, many thanks, Ben.

raceiat.iqx:

<usermanual>

Race Implicit Attitude Test (IAT) - with pictures
SCRIPT INFO

Main Inquisit programming: Sean Draine (seandr@millisecond.com)
last updated: 02-12-2018 by K.Borchert (katjab@millisecond.com) for Millisecond Software LLC

Script Copyright © 02-12-2018 Millisecond Software


BACKGROUND INFO

The Implicit Association Task (Greenwald, McGhee, & Schwartz, 1998) is a widely-used cognitive-behavioral paradigm
that measures the strength of automatic (implicit) associations between concepts in people’s minds relying
on latency measures in a simple sorting task.

The strength of an association between concepts is measured by the standardized mean difference score of
the 'hypothesis-inconsistent' pairings and 'hypothesis-consistent' pairings (d-score) (Greenwald, Nosek, & Banaji, 2003).
In general, the higher the d-score the stronger is the association between the 'hypothesis-consistent' pairings
(decided by researchers). Negative d-scores suggest a stronger association between the 'hypothesis-inconsistent' pairings.

Inquisit calculates d-scores using the improved scoring algorithm as described in Greenwald et al (2003).
Error trials are handled by requiring respondents to correct their responses according to recommendation (p.214).

D-scores obtained with this script:
Positive d-scores: support a stronger association between 'White American-Good' and 'Black American-Bad' than for the opposite pairings
Negative d-scores: support a stronger association between 'Black American-Good' and 'White American-Bad' than for the opposite pairings

References:

general IAT:
Greenwald, A. G., McGhee, D. E., & Schwartz, J. K. L. (1998). Measuring individual differences in implicit cognition:
The Implicit Association Test. Journal of Personality and Social Psychology, 74, 1464-1480.

Greenwald, A. G., Nosek, B. A., & Banaji, M. R. (2003). Understanding and Using the Implicit Association Test:
I. An Improved Scoring Algorithm. Journal of Personality and Social Psychology, 85, 197-216.

Stimuli: This script is based on the generic Inquisit IAT template and uses the pictures from Project Implicit's Race IAT
(Retrieved from osf.io/y9hiq)


*Task*
Participants are asked to categorize attributes (e.g. "joyful"; "tragic") and target items (e.g pictures of Black Americans and White Americans)
into predetermined categories via keystroke presses. The basic task is to press a left key (E) if an item (e.g. "joyful")
belongs to the category presented on the left (e.g. "Good") and to press the right key (I) if the word (e.g. "tragic")
belongs to the category ("Bad") presented on the right.
For practice, participants sort items into the target categories "Black Americans vs. White Americans" and the attribute categories "Good vs. Bad".
For the test, participants are asked to sort categories into the paired/combined categories (e.g.
"White Americans OR Good" on the left vs. "Black Americans OR Bad" on the right). Pairings are reversed for a second test
(e.g. "Black Americans OR Good" on the left vs. "White Americans OR Bad" on the right). Order is counterbalanced by groupnumber.


DATA FILE INFORMATION:
The default data stored in the data files are:

(1) Raw data file: 'RaceIAT_raw*.iqdat' (a separate file for each participant)

build:Inquisit build
computer.platform:the platform the script was run on
date, time, subject, group:date and time script was run with the current subject/groupnumber
Note: group1/group2 counterbalance the order in which the pairings are run
blockcode, blocknum:the name and number of the current block
trialcode, trialnum: the name and number of the currently recorded trial
(Note: not all trials that are run might record data; by default data is collected unless /recorddata = false is set for a particular trial/block)
response:the final trial response (scancodes of the keys pressed)
Note: script saves the final and -by design- correct response
correct:the accuracy of the initial response
0 = initial response was incorrect and needed to be corrected
1 = initial response is correct
latency:the latency of the final (correct) response in ms
stimulusnumber:the number of the current stimulus
stimulusitem:the currently presented item
expressions.da:d-score of the first short blocks
expressions.db:d-score of the second long blocks
expressions.d:overall d-score(non-weighted mean of the 2 d-scores)
/ percentcorrect:   the overall percent correct score of initial responses of test trials of D-score qualifying latencies

(2) Summary data file: 'RaceIAT_summary*.iqdat' (a separate file for each participant)

script.startdate:date script was run
script.starttime:time script was started
script.subjectid:subject id number
script.groupid:group id number
script.elapsedtime:time it took to run script (in ms)
computer.platform:the platform the script was run on
/completed:0 = script was not completed (prematurely aborted); 1 = script was completed (all conditions run)
expressions.da:d-score of the first blocks
expressions.db:d-score of the second blocks
expressions.d:overall d-score
/ percentcorrect:   the overall percent correct score of initial responses of test trials of D-score qualifying latencies



EXPERIMENTAL SET-UP

Hypothesis-consistent pairings vs. hypothesis-inconsistent pairings; tested within-subjects
=> order is counterbalanced by groupnumber assignment

Block Sequence:
1. Target Category sorting training
2. Attribute sorting training
3. 1. Test Block of hypothesis-consistent* pairings with 20 trials (half the participant start with inconsistent pairings)
4. 2. Test Block of hypothesis-consistent pairings with 40 trials
5. Target Category sorting training with targets switching sides
6. 1. Test Block of hypothesis-inconsistent pairings with 20 trials
7. 2. Test Block of hypothesis-inconsistent pairings with 40 trials

In all Test Blocks:
* attributes and targets alternate
* attributes as well as targets are randomly selected without replacement

Trial Sequence:
Target -> until correct response -> ISI: 250ms (default)-> Target....STIMULI
Stimuli can be edited under section Editable Stimuli


INSTRUCTIONS
* start instruction page is provided as an html page. It automatically adapts to different images and category labels UNLESS
the number of attributes and/or targets have been changed. In this case, changes have to be
made to file "intro_iat.htm", so that the correct number of items are presented in the overview table.

Example: instead of 8 words for target A, only 5 should be presented:

in file "intro_iat.htm":
change:
<td><%item.targetA.item(1)%>, <%item.targetA.item(2)%>, <%item.targetA.item(3)%>, <%item.targetA.item(4)%>,
<%item.targetA.item(5)%>, <%item.targetA.item(6)%>, <%item.targetA.item(7)%>, <%item.targetA.item(8)%>
</td>

To:
<td><%item.targetA.item(1)%>, <%item.targetA.item(2)%>, <%item.targetA.item(3)%>, <%item.targetA.item(4)%>,
<%item.targetA.item(5)%>
</td>

* item.instructions under section 'Editable Instructions' contains the the trial instructions
The instructions adapt automatically if different attributes and targets are used.


EDITABLE CODE:
check below for (relatively) easily editable parameters, stimuli, instructions etc.
Keep in mind that you can use this script as a template and therefore always "mess" with the entire code to further customize your experiment.

The parameters you can change are:

/showsummaryfeedback:set parameter showsummaryfeedback = true to display summary feedback to participants at the end (default)
set parameter showsummaryfeedback = false if no summary feedback should be presented to participants
/ISI:interstimulus interval (in ms) (default: 250ms)
</usermanual>


**************************************************************************************************************
**************************************************************************************************************
EDITABLE PARAMETERS: change editable parameters here
**************************************************************************************************************
**************************************************************************************************************

<parameters>
/showsummaryfeedback = true
/ISI = 250
</parameters>

**************************************************************************************************************
**************************************************************************************************************
EDITABLE STIMULI: change editable stimuli here
**************************************************************************************************************
**************************************************************************************************************
This sample IAT can be easily adapted to different target categories
and attributes. To change the categories, you need only change the
stimulus items and labels immediately below this line.

***********************************************************************
<item attributeAlabel>
/1 = "Good"
</item>

<item attributeA>
/1 = "Marvelous"
/2 = "Superb"
/3 = "Pleasure"
/4 = "Beautiful"
/5 = "Joyful"
/6 = "Glorious"
/7 = "Lovely"
/8 = "Wonderful"
</item>

<item attributeBlabel>
/1 = "Bad"
</item>

<item attributeB>
/1 = "Tragic"
/2 = "Horrible"
/3 = "Agony"
/4 = "Painful"
/5 = "Terrible"
/6 = "Awful"
/7 = "Humiliate"
/8 = "Nasty"
</item>

<item targetAlabel>
/1 = "White American"
</item>

<item targetA>
/1 = "wf2_nc.jpg"
/2 = "wf3_nc.jpg"
/3 = "wf6_nc.jpg"
/4 = "wm1_nc.jpg"
/5 = "wm4_nc.jpg"
/6 = "wm6_nc.jpg"
</item>

<item targetBlabel>
/1 = "Black American"
</item>

<item targetB>
/1 = "bf14_nc.jpg"
/2 = "bf23_nc.jpg"
/3 = "bf56_nc.jpg"
/4 = "bm14_nc.jpg"
/5 = "bm23_nc.jpg"
/6 = "bm56_nc.jpg"
</item>


**************************************************************************************************************
**************************************************************************************************************
EDITABLE INSTRUCTIONS: change instructions here
**************************************************************************************************************
**************************************************************************************************************
<instruct>
/ fontstyle = ("Arial", 2.8%, false, false, false, false, 5, 1)
/ txcolor = (black)


/ screencolor = black
</instruct>


<htmlpage iatintro>
/ file = "intro_pictureiat.htm"
</htmlpage>

<item instructions>
/ 1 = "Put your left finger on the 'E' response key for items that belong to the category '<%expressions.leftTarget%>'.
Put your right finger on the 'I' response key for items that belong to the category '<%expressions.rightTarget%>'.
~nItems will appear one-by-one in the middle of the screen.
~nIf you make an error, a red X will appear - to continue, press the other response key.
~nGo as fast as you can while making as few errors as possible."

/ 2 = "Put your left finger on the 'E' response key for items that belong to the category '<%item.attributeAlabel.item(1)%>'.
Put your right finger on the 'I' response key for items that belong to the category '<%item.attributeBlabel.item(1)%>'.
~nIf you make an error, a red X will appear - to continue, press the other response key.
~nGo as fast as you can while making as few errors as possible."

/ 3 = "Press the left 'E' key for '<%item.attributeAlabel.item(1)%>' and '<%expressions.leftTarget%>'.
Press the right 'I' key for '<%item.attributeBlabel.item(1)%>' and '<%expressions.rightTarget%>'.
~nEach item belongs to only one category.
~nIf you make an error, a red X will appear - to continue, press the other response key.
~nGo as fast as you can while making as few errors as possible."

/ 4 = "This is the same task as the previous one.
~n~nPress the left 'E' key for '<%item.attributeAlabel.item(1)%>' and '<%expressions.leftTarget%>'.
Press the right 'I' key for '<%item.attributeBlabel.item(1)%>' and '<%expressions.rightTarget%>'.
~nEach item belongs to only one category.
~nGo as fast as you can while making as few errors as possible."

/ 5 = "Attention! The labels have changed sides.
~nPress the left 'E' key for '<%expressions.rightTarget%>'.
Press the right 'I' key for '<%expressions.leftTarget%>'.
~nGo as fast as you can while making as few errors as possible."

/ 6 = "Press the left 'E' key for '<%item.attributeAlabel.item(1)%>' and '<%expressions.rightTarget%>'.
Press the right 'I' key for '<%item.attributeBlabel.item(1)%>' and '<%expressions.leftTarget%>'.
~nIf you make an error, a red X will appear - to continue, press the other response key.
~nGo as fast as you can while making as few errors as possible."

/ 7 = "This is the same task as the previous one.
~nPress the left 'E' key for '<%item.attributeAlabel.item(1)%>' and '<%expressions.rightTarget%>'.
Press the right 'I' key for '<%item.attributeBlabel.item(1)%>' and '<%expressions.leftTarget%>'.
~nEach item belongs to only one category.
~nGo as fast as you can while making as few errors as possible."
</item>


Note: expressions used to assign the correct label to the left and right response keys
<expressions>
/leftTarget = if(mod(script.groupid, 2) != 0){
item.targetAlabel.item(1);
} else {
item.targetBlabel.item(1);
};
/rightTarget = if (mod(script.groupid, 2) != 0){
item.targetBlabel.item(1);
} else {
item.targetAlabel.item(1);
};
</expressions>

<text spacebar>
/ items = ("Press the SPACE BAR to begin.")
/ position = (50%, 90%)
/ valign = bottom
</text>

<text errorReminder>
/ items = ("If you make an error, a red X will appear. Press the other key to continue.")
/ position = (50%, 95%)
/ valign = bottom
/ fontstyle = ("Arial", 3%, false, false, false, false, 5, 1)
/ txcolor = gray
/ erase = false
</text>

***********************************************************************
Performance summary
***********************************************************************

<trial summary>
/ stimulustimes = [0=summary]
/ validresponse = (" ")
/ recorddata = false
/ ontrialbegin = [values.magnitude = "little to no"]
/ ontrialbegin = [if( abs(expressions.d) > 0.15 ) values.magnitude = "a slight"]
/ ontrialbegin = [if( abs(expressions.d) > 0.35 ) values.magnitude = "a moderate"]
/ ontrialbegin = [if( abs(expressions.d) >= 0.65 ) values.magnitude = "a strong"]
/ ontrialbegin = [if (expressions.d >= 0.0) values.preferred = item.targetALabel.1]
/ ontrialbegin = [if (expressions.d < 0.0) values.preferred = item.targetBLabel.1]
/ ontrialbegin = [if (expressions.d < 0.0) values.notpreferred= item.targetALabel.1]
/ ontrialbegin = [if (expressions.d >= 0.0) values.notpreferred= item.targetBLabel.1]
</trial>

<text summary>
/ items = ("Your IAT score (D) was <% expressions.d %>, which suggests <% values.magnitude %> automatic preference for <% values.preferred %> compared to <% values.notpreferred %>.~n~n~nPress the spacebar to complete this session.")
/ size = (60%, 60%)
/ hjustify = left
</text>

**************************************************************************************************************
!!!REMAINING CODE: Customize after careful consideration only!!!
**************************************************************************************************************


**************************************************************************************************************
**************************************************************************************************************
DEFAULTS
**************************************************************************************************************
**************************************************************************************************************
script requires Inquisit 5.0.7.0 or higher

<defaults>
/ fontstyle = ("Arial", 3.5%)
/ screencolor = black
/ txbgcolor = black
/ txcolor = white
/ minimumversion = "5.0.7.0"
/ canvasaspectratio = (4, 3)
</defaults>

**************************************************************************************************************
**************************************************************************************************************
DATA
**************************************************************************************************************
**************************************************************************************************************

Note: data file explanations under User Manual Information at the top

***********************
raw data file
***********************
<data>
/ columns = (build, computer.platform, date, time, group, subject, blockcode, blocknum, trialcode, trialnum, response, correct, latency,
stimulusnumber, stimulusitem, expressions.da, expressions.db, expressions.d, expressions.percentcorrect)
/ separatefiles = true
</data>

****************
summary data
****************

<summarydata>
/ columns = (script.startdate, script.starttime, script.subjectid, script.groupid, script.elapsedtime, computer.platform, values.completed,
expressions.da, expressions.db, expressions.d, expressions.percentcorrect)
/ separatefiles = true
</summarydata>

**************************************************************************************************************
**************************************************************************************************************
VALUES: automatically updated
**************************************************************************************************************
**************************************************************************************************************
            
/completed:0 = script was not completed; 1 = script was completed (all conditions run)

/ sum1a:tracks the sum of the latencies to correct responses (latencies <= 10000ms) for the first compatible block 1A
Note: by design, all final trial responses are correct (regardless of accuracy of initial response)
/ sum2a:tracks the sum of the latencies to correct responses (latencies <= 10000ms) for the first incompatible block 2A
Note: by design, all final trial responses are correct (regardless of accuracy of initial response)
/ sum1b:tracks the sum of the latencies to correct responses (latencies <= 10000ms) for the second compatible block 1B
Note: by design, all final trial responses are correct (regardless of accuracy of initial response)
/ sum2b:tracks the sum of the latencies to correct responses (latencies <= 10000ms) for the second incompatible block 2B
Note: by design, all final trial responses are correct (regardless of accuracy of initial response)
/ n1a:counts the number of trials in first compatible block 1A (except first one)
/ n2a:counts the number of trials in first incompatible block 2A (except first one)
/ n1b:counts the number of trials in second compatible block 1B
/ n2b:counts the number of trials in second incompatible block 2B
/ ss1a:tracks the sum of the squared latencies to correct responses (latencies <= 10000ms) in the first compatible block
/ ss2atracks the sum of the squared latencies to correct responses (latencies <= 10000ms) in the first incompatible block
/ ss1b:tracks the sum of the squared latencies to correct responses (latencies <= 10000ms) in the second compatible block
/ ss2b:tracks the sum of the squared latencies to correct responses (latencies <= 10000ms) in the second incompatible block
/ magnitude:stores the magnitude of the implicit preference: "little to no", "a slight", "a moderate", "a strong"
/ preferred:stores the preferred target category
/ notpreferred :stores the non preferred target category
/ n_correct:counts all initial correct responses of all trials that count towards D score

<values>
/ completed = 0
/ sum1a = 0
/ sum2a = 0
/ sum1b = 0
/ sum2b = 0
/ n1a = 0
/ n2a = 0
/ n1b = 0
/ n2b = 0
/ ss1a = 0
/ ss2a = 0
/ ss1b = 0
/ ss2b = 0
/ magnitude = "unknown"
/ preferred = "unknown"
/ notpreferred = "unknown"
/ n_correct = 0
/progresswidth = 0
/instructionIndex = 0</values>

**************************************************************************************************************
**************************************************************************************************************
EXPRESSIONS
**************************************************************************************************************
**************************************************************************************************************

* 1 is compatible, 2 is incompatible
* a is first block, b is second block

/ m1a:mean latencies of correct responses in first compatible block
/ m2a:mean latencies of correct responses in first incompatible block
/ m1b:mean latencies of correct responses in second compatible block
/ m2b:mean latencies of correct responses in second incompatible block
/ sd1a:standard deviation of latencies of correct responses in first compatible block
/ sd2astandard deviation of latencies of correct responses in first incompatible block
/ sd1b:standard deviation of latencies of correct responses in second compatible block
/ sd2b:standard deviation of latencies of correct responses in second incompatible block
/ sdastandarddeviation of latencies in first block
/ sdb standarddeviation of latencies in second block
/ daBigGrin-score for first blocks
/ dbBigGrin-score for second blocks
/ d:overall D-score
/ percentcorrect:   calculates the overall percent correct score of initial responses of test trials of D-score qualifying latencies
/progress:sets the length of the progress bar to %

<expressions>
/ m1a = values.sum1a / values.n1a
/ m2a = values.sum2a / values.n2a
/ m1b = values.sum1b / values.n1b
/ m2b = values.sum2b / values.n2b
/ sd1a = sqrt((values.ss1a - (values.n1a * (expressions.m1a * expressions.m1a))) / (values.n1a - 1))
/ sd2a = sqrt((values.ss2a - (values.n2a * (expressions.m2a * expressions.m2a))) / (values.n2a - 1))
/ sd1b = sqrt((values.ss1b - (values.n1b * (expressions.m1b * expressions.m1b))) / (values.n1b - 1))
/ sd2b = sqrt((values.ss2b - (values.n2b * (expressions.m2b * expressions.m2b))) / (values.n2b - 1))
/ sda = sqrt((((values.n1a - 1) * (expressions.sd1a * expressions.sd1a) + (values.n2a - 1) * (expressions.sd2a * expressions.sd2a)) + ((values.n1a + values.n2a) * ((expressions.m1a - expressions.m2a) * (expressions.m1a - expressions.m2a)) / 4) ) / (values.n1a + values.n2a - 1) )
/ sdb = sqrt((((values.n1b - 1) * (expressions.sd1b * expressions.sd1b) + (values.n2b - 1) * (expressions.sd2b * expressions.sd2b)) + ((values.n1b + values.n2b) * ((expressions.m1b - expressions.m2b) * (expressions.m1b - expressions.m2b)) / 4) ) / (values.n1b + values.n2b - 1) )
/ da = (m2a - m1a) / expressions.sda
/ db = (m2b - m1b) / expressions.sdb
/ d = (expressions.da + expressions.db) / 2
/ percentcorrect = (values.n_correct/ (values.n1a + values.n1b + values.n2a + values.n2b)) * 100
/progress = 1% * values.progresswidth
</expressions>

**************************************************************************************************************
**************************************************************************************************************
INSTRUCTIONS
**************************************************************************************************************
**************************************************************************************************************
<text instructions>
/ items = instructions
/ position = (10%, 25%)
/ halign = left
/ valign = top
/ hjustify = left
/ vjustify = center
/ size = (80%, 50%)
/ select = values.instructionIndex
</text>

<trial instructions>
/ ontrialbegin = [
values.progresswidth += 10;
values.instructionIndex += 1;
]
/ stimulustimes = [1=instructions, spacebar, progressbar, progressbar_fill]
/ correctresponse = (57)
/ recorddata = false
</trial>

**************************************************************************************************************
**************************************************************************************************************
STIMULI
**************************************************************************************************************
**************************************************************************************************************
<shape progressbar>
/shape = rectangle
/ size = (70%, 2%)
/ color = gray
/ position = (15%, 95%)
/ halign = left
/ valign = top
</shape>

<shape progressbar_fill>
/shape = rectangle
/ size = (expressions.progress, 2%)
/ color = green
/ position = (15%, 95%)
/ halign = left
/ valign = top
</shape>

<text attributeA>
/ items = attributeA
/ fontstyle = ("Arial", 5%)
/ txcolor = green
</text>

<text attributeB>
/ items = attributeB
/ fontstyle = ("Arial", 5%)
/ txcolor = green
</text>

<picture targetB>
/ items = targetB
/ size = (20%, 20%)
</picture>

<picture targetA>
/ items = targetA
/ size = (20%, 20%)
</picture>

<text error>
/ position = (50%, 75%)
/ items = ("X")
/ color = red
/ fontstyle = ("Arial", 10%, true)
</text>

<text attributeAleft>
/ items = attributeAlabel
/ valign = top
/ halign = left
/ position = (5%, 5%)
/ txcolor = green
/ fontstyle = ("Arial", 5%)
</text>

<text attributeBright>
/ items = attributeBlabel
/ valign = top
/ halign = right
/ position = (95%, 5%)
/ txcolor = green
/ fontstyle = ("Arial", 5%)
</text>

<text targetBleft>
/ items = targetBlabel
/ valign = top
/ halign = left
/ position = (5%, 5%)
/ fontstyle = ("Arial", 5%)
</text>

<text targetBright>
/ items = targetBlabel
/ valign = top
/ halign = right
/ position = (95%, 5%)
/ fontstyle = ("Arial", 5%)
</text>

<text targetBleftmixed>
/ items = targetBlabel
/ valign = top
/ halign = left
/ position = (5%, 19%)
/ fontstyle = ("Arial", 5%)
</text>

<text targetBrightmixed>
/ items = targetBlabel
/ valign = top
/ halign = right
/ position = (95%, 19%)
/ fontstyle = ("Arial", 5%)
</text>

<text targetAleft>
/ items = targetAlabel
/ valign = top
/ halign = left
/ position = (5%, 5%)
/ fontstyle = ("Arial", 5%)
</text>

<text targetAright>
/ items = targetAlabel
/ valign = top
/ halign = right
/ position = (95%, 5%)
/ fontstyle = ("Arial", 5%)
</text>

<text targetAleftmixed>
/ items = targetAlabel
/ valign = top
/ halign = left
/ position = (5%, 19%)
/ fontstyle = ("Arial", 5%)
</text>

<text targetArightmixed>
/ items = targetAlabel
/ valign = top
/ halign = right
/ position = (95%, 19%)
/ fontstyle = ("Arial", 5%)
</text><text orleft>
/ items = ("or")
/ valign = top
/ halign = left
/ position = (5%, 12%)
/ fontstyle = ("Arial", 5%)
</text>

<text orright>
/ items = ("or")
/ valign = top
/ halign = right
/ position = (95%, 12%)
/ fontstyle = ("Arial", 5%)
</text>


**************************************************************************************************************
**************************************************************************************************************
TRIALS
**************************************************************************************************************
**************************************************************************************************************

<trial attributeA>
/ validresponse = ("E", "I")
/ correctresponse = ("E")
/ stimulusframes = [1 = attributeA, errorReminder]
/ posttrialpause = parameters.ISI
</trial>

<trial attributeB>
/ validresponse = ("E", "I")
/ correctresponse = ("I")
/ stimulusframes = [1 = attributeB, errorReminder]
/ posttrialpause = parameters.ISI
</trial>

<trial targetBleft>
/ validresponse = ("E", "I")
/ correctresponse = ("E")
/ stimulusframes = [1 = targetB, errorReminder]
/ posttrialpause = parameters.ISI
</trial>

<trial targetBright>
/ validresponse = ("E", "I")
/ correctresponse = ("I")
/ stimulusframes = [1 = targetB, errorReminder]
/ posttrialpause = parameters.ISI
</trial>

<trial targetAleft>
/ validresponse = ("E", "I")
/ correctresponse = ("E")
/ stimulusframes = [1 = targetA, errorReminder]
/ posttrialpause = parameters.ISI
</trial>

<trial targetAright>
/ validresponse = ("E", "I")
/ correctresponse = ("I")
/ stimulusframes = [1 = targetA, errorReminder]
/ posttrialpause = parameters.ISI
</trial>

**************************************************************************************************************
**************************************************************************************************************
BLOCKS
**************************************************************************************************************
**************************************************************************************************************

<block attributepractice>
/ bgstim = (attributeAleft, attributeBright)
/ trials = [
1=instructions;
2-21 = random(attributeA, attributeB);
]
/ errormessage = true(error,200)
/ responsemode = correct
</block>

<block targetcompatiblepractice>
/ bgstim = (targetAleft, targetBright)
/ trials = [
1=instructions;
2-21 = random(targetAleft, targetBright);
]
/ errormessage = true(error,200)
/ responsemode = correct
</block>

<block targetincompatiblepractice>
/ bgstim = (targetAright, targetBleft)
/ trials = [
1=instructions;
2-21 = random(targetAright, targetBleft);
]
/ errormessage = true(error,200)
/ responsemode = correct
</block>

<block targetcompatiblepracticeswitch>
/ bgstim = (targetAleft, targetBright)
/ trials = [
1=instructions;
2-41 = random(targetAleft, targetBright);
]
/ errormessage = true(error,200)
/ responsemode = correct
</block>

<block targetincompatiblepracticeswitch>
/ bgstim = (targetAright, targetBleft)
/ trials = [
1=instructions;
2-41 = random(targetAright, targetBleft);
]
/ errormessage = true(error,200)
/ responsemode = correct
</block>

<block compatibletest1>
/ bgstim = (targetAleftmixed, orleft, attributeAleft, targetBrightmixed, orright, attributeBright)
/ trials = [1=instructions;
3,5,7,9,11,13,15,17,19,21= random(targetAleft, targetBright);
2,4,6,8,10,12,14,16,18,20 = random(attributeA, attributeB)]
/ errormessage = true(error,200)
/ responsemode = correct
/ ontrialend = [
if(block.compatibletest1.latency <= 10000 && block.compatibletest1.currenttrialnumber != 1 ) values.sum1a = values.sum1a + block.compatibletest1.latency;
if(block.compatibletest1.latency <= 10000 && block.compatibletest1.currenttrialnumber != 1 ) values.n1a += 1;
if(block.compatibletest1.latency <= 10000 && block.compatibletest1.currenttrialnumber != 1 ) values.ss1a = values.ss1a + (block.compatibletest1.latency * block.compatibletest1.latency);
if(block.compatibletest1.latency <= 10000 && block.compatibletest1.currenttrialnumber != 1 ) values.n_correct += block.compatibletest1.correct;
]
</block>

<block compatibletest2>
/ bgstim = (targetAleftmixed, orleft, attributeAleft, targetBrightmixed, orright, attributeBright)
/ trials = [
2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40 = random(targetAleft, targetBright);
1,3,5,7,9,11,13,15,17,19,21,23,25,27,29,31,33,35,37,39 = random(attributeA, attributeB)]
/ errormessage = true(error,200)
/ responsemode = correct
/ ontrialend = [
if(block.compatibletest2.latency <= 10000) values.sum1b = values.sum1b + block.compatibletest2.latency;
if(block.compatibletest2.latency <= 10000) values.n1b += 1;
if(block.compatibletest2.latency <= 10000) values.ss1b = values.ss1b + (block.compatibletest2.latency * block.compatibletest2.latency);
if(block.compatibletest2.latency <= 10000) values.n_correct += block.compatibletest2.correct;
]
</block>

<block incompatibletest1>
/ bgstim = (targetBleftmixed, orleft, attributeAleft, targetArightmixed, orright, attributeBright)
/ trials = [1=instructions;
3,5,7,9,11,13,15,17,19,21 = random(targetBleft, targetAright);
2,4,6,8,10,12,14,16,18,20 = random(attributeA, attributeB)]
/ errormessage = true(error,200)
/ responsemode = correct
/ ontrialend = [
if(block.incompatibletest1.latency <= 10000 && block.incompatibletest1.currenttrialnumber != 1) values.sum2a = values.sum2a + block.incompatibletest1.latency;
if(block.incompatibletest1.latency <= 10000 && block.incompatibletest1.currenttrialnumber != 1 ) values.n2a += 1;
if(block.incompatibletest1.latency <= 10000 && block.incompatibletest1.currenttrialnumber != 1 ) values.ss2a = values.ss2a + (block.incompatibletest1.latency * block.incompatibletest1.latency);
if(block.incompatibletest1.latency <= 10000 && block.incompatibletest1.currenttrialnumber != 1 ) values.n_correct += block.incompatibletest1.correct;
]
</block>

<block incompatibletest2>
/ bgstim = (targetBleftmixed, orleft, attributeAleft, targetArightmixed, orright, attributeBright)
/ trials = [
2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40 = random(targetBleft, targetAright);
1,3,5,7,9,11,13,15,17,19,21,23,25,27,29,31,33,35,37,39 = random(attributeA, attributeB)]
/ errormessage = true(error,200)
/ responsemode = correct
/ ontrialend = [
if(block.incompatibletest2.latency <= 10000) values.sum2b = values.sum2b + block.incompatibletest2.latency;
if(block.incompatibletest2.latency <= 10000) values.n2b += 1;
if(block.incompatibletest2.latency <= 10000) values.ss2b = values.ss2b + (block.incompatibletest2.latency * block.incompatibletest2.latency);
if(block.incompatibletest2.latency <= 10000) values.n_correct += block.incompatibletest2.correct;
]
</block>

<block compatibletestinstructions>
/ bgstim = (targetAleftmixed, orleft, attributeAleft, targetBrightmixed, orright, attributeBright)
/ trials = [1=instructions]
/ recorddata = false
</block>

<block incompatibletestinstructions>
/ bgstim = (targetBleftmixed, orleft, attributeAleft, targetArightmixed, orright, attributeBright)
/ trials = [1=instructions]
/ recorddata = false
</block>

<block summary>
/skip = [parameters.showsummaryfeedback == false]
/ trials = [1=summary]
/ recorddata = false
</block>

**************************************************************************************************************
**************************************************************************************************************
EXPERIMENT
**************************************************************************************************************
**************************************************************************************************************
Groupassignment is done by groupnumber

<expt>
/ preinstructions = (iatintro)
/subjects = (1 of 2)
/groupassignment = groupnumber
/ blocks = [
1=targetcompatiblepractice;
2=attributepractice;
3=compatibletest1;
4=compatibletestinstructions;
5=compatibletest2;
6=targetincompatiblepractice;
7=incompatibletest1;
8=incompatibletestinstructions;
9=incompatibletest2;
10=summary;
]
/onexptend = [values.completed = 1]
</expt>

<expt>
/ preinstructions = (iatintro)
/subjects = (2 of 2)
/groupassignment = groupnumber
/ blocks = [
1=targetincompatiblepractice;
2=attributepractice;
3=incompatibletest1;
4=incompatibletestinstructions;
5=incompatibletest2;
6=targetcompatiblepractice;
7=compatibletest1;
8=compatibletestinstructions;
9=compatibletest2;
10=summary;
]
/onexptend = [values.completed = 1]
</expt>

***********************************************************************
Test Monkey
***********************************************************************
<monkey>
/ latencydistribution = normal(500, 100)
/ percentcorrect = 90
</monkey>
**************************************************************************************************************
End of File


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Group: Administrators
Posts: 9.2K, Visits: 40K
bkorsmo - Tuesday, November 13, 2018
I am running the Racism IAT which is counterbalanced between even and odd group numbers. I need to run subjects through the odd numbered, target compatible 1st, target incompatible 2nd,  every time. How do I run group numbers 1 and 3 only?

I am scared to alter the Racism IAT script and do not how to perform URL parameters in Inquisit Web to assign group IDs.

Is there an easy fix? Help, many thanks, Ben.

raceiat.iqx:

<usermanual>

Race Implicit Attitude Test (IAT) - with pictures
SCRIPT INFO

Main Inquisit programming: Sean Draine (seandr@millisecond.com)
last updated: 02-12-2018 by K.Borchert (katjab@millisecond.com) for Millisecond Software LLC

Script Copyright © 02-12-2018 Millisecond Software


BACKGROUND INFO

The Implicit Association Task (Greenwald, McGhee, & Schwartz, 1998) is a widely-used cognitive-behavioral paradigm
that measures the strength of automatic (implicit) associations between concepts in people’s minds relying
on latency measures in a simple sorting task.

The strength of an association between concepts is measured by the standardized mean difference score of
the 'hypothesis-inconsistent' pairings and 'hypothesis-consistent' pairings (d-score) (Greenwald, Nosek, & Banaji, 2003).
In general, the higher the d-score the stronger is the association between the 'hypothesis-consistent' pairings
(decided by researchers). Negative d-scores suggest a stronger association between the 'hypothesis-inconsistent' pairings.

Inquisit calculates d-scores using the improved scoring algorithm as described in Greenwald et al (2003).
Error trials are handled by requiring respondents to correct their responses according to recommendation (p.214).

D-scores obtained with this script:
Positive d-scores: support a stronger association between 'White American-Good' and 'Black American-Bad' than for the opposite pairings
Negative d-scores: support a stronger association between 'Black American-Good' and 'White American-Bad' than for the opposite pairings

References:

general IAT:
Greenwald, A. G., McGhee, D. E., & Schwartz, J. K. L. (1998). Measuring individual differences in implicit cognition:
The Implicit Association Test. Journal of Personality and Social Psychology, 74, 1464-1480.

Greenwald, A. G., Nosek, B. A., & Banaji, M. R. (2003). Understanding and Using the Implicit Association Test:
I. An Improved Scoring Algorithm. Journal of Personality and Social Psychology, 85, 197-216.

Stimuli: This script is based on the generic Inquisit IAT template and uses the pictures from Project Implicit's Race IAT
(Retrieved from osf.io/y9hiq)


*Task*
Participants are asked to categorize attributes (e.g. "joyful"; "tragic") and target items (e.g pictures of Black Americans and White Americans)
into predetermined categories via keystroke presses. The basic task is to press a left key (E) if an item (e.g. "joyful")
belongs to the category presented on the left (e.g. "Good") and to press the right key (I) if the word (e.g. "tragic")
belongs to the category ("Bad") presented on the right.
For practice, participants sort items into the target categories "Black Americans vs. White Americans" and the attribute categories "Good vs. Bad".
For the test, participants are asked to sort categories into the paired/combined categories (e.g.
"White Americans OR Good" on the left vs. "Black Americans OR Bad" on the right). Pairings are reversed for a second test
(e.g. "Black Americans OR Good" on the left vs. "White Americans OR Bad" on the right). Order is counterbalanced by groupnumber.


DATA FILE INFORMATION:
The default data stored in the data files are:

(1) Raw data file: 'RaceIAT_raw*.iqdat' (a separate file for each participant)

build:Inquisit build
computer.platform:the platform the script was run on
date, time, subject, group:date and time script was run with the current subject/groupnumber
Note: group1/group2 counterbalance the order in which the pairings are run
blockcode, blocknum:the name and number of the current block
trialcode, trialnum: the name and number of the currently recorded trial
(Note: not all trials that are run might record data; by default data is collected unless /recorddata = false is set for a particular trial/block)
response:the final trial response (scancodes of the keys pressed)
Note: script saves the final and -by design- correct response
correct:the accuracy of the initial response
0 = initial response was incorrect and needed to be corrected
1 = initial response is correct
latency:the latency of the final (correct) response in ms
stimulusnumber:the number of the current stimulus
stimulusitem:the currently presented item
expressions.da:d-score of the first short blocks
expressions.db:d-score of the second long blocks
expressions.d:overall d-score(non-weighted mean of the 2 d-scores)
/ percentcorrect:   the overall percent correct score of initial responses of test trials of D-score qualifying latencies

(2) Summary data file: 'RaceIAT_summary*.iqdat' (a separate file for each participant)

script.startdate:date script was run
script.starttime:time script was started
script.subjectid:subject id number
script.groupid:group id number
script.elapsedtime:time it took to run script (in ms)
computer.platform:the platform the script was run on
/completed:0 = script was not completed (prematurely aborted); 1 = script was completed (all conditions run)
expressions.da:d-score of the first blocks
expressions.db:d-score of the second blocks
expressions.d:overall d-score
/ percentcorrect:   the overall percent correct score of initial responses of test trials of D-score qualifying latencies



EXPERIMENTAL SET-UP

Hypothesis-consistent pairings vs. hypothesis-inconsistent pairings; tested within-subjects
=> order is counterbalanced by groupnumber assignment

Block Sequence:
1. Target Category sorting training
2. Attribute sorting training
3. 1. Test Block of hypothesis-consistent* pairings with 20 trials (half the participant start with inconsistent pairings)
4. 2. Test Block of hypothesis-consistent pairings with 40 trials
5. Target Category sorting training with targets switching sides
6. 1. Test Block of hypothesis-inconsistent pairings with 20 trials
7. 2. Test Block of hypothesis-inconsistent pairings with 40 trials

In all Test Blocks:
* attributes and targets alternate
* attributes as well as targets are randomly selected without replacement

Trial Sequence:
Target -> until correct response -> ISI: 250ms (default)-> Target....STIMULI
Stimuli can be edited under section Editable Stimuli


INSTRUCTIONS
* start instruction page is provided as an html page. It automatically adapts to different images and category labels UNLESS
the number of attributes and/or targets have been changed. In this case, changes have to be
made to file "intro_iat.htm", so that the correct number of items are presented in the overview table.

Example: instead of 8 words for target A, only 5 should be presented:

in file "intro_iat.htm":
change:
<td><%item.targetA.item(1)%>, <%item.targetA.item(2)%>, <%item.targetA.item(3)%>, <%item.targetA.item(4)%>,
<%item.targetA.item(5)%>, <%item.targetA.item(6)%>, <%item.targetA.item(7)%>, <%item.targetA.item(8)%>
</td>

To:
<td><%item.targetA.item(1)%>, <%item.targetA.item(2)%>, <%item.targetA.item(3)%>, <%item.targetA.item(4)%>,
<%item.targetA.item(5)%>
</td>

* item.instructions under section 'Editable Instructions' contains the the trial instructions
The instructions adapt automatically if different attributes and targets are used.


EDITABLE CODE:
check below for (relatively) easily editable parameters, stimuli, instructions etc.
Keep in mind that you can use this script as a template and therefore always "mess" with the entire code to further customize your experiment.

The parameters you can change are:

/showsummaryfeedback:set parameter showsummaryfeedback = true to display summary feedback to participants at the end (default)
set parameter showsummaryfeedback = false if no summary feedback should be presented to participants
/ISI:interstimulus interval (in ms) (default: 250ms)
</usermanual>


**************************************************************************************************************
**************************************************************************************************************
EDITABLE PARAMETERS: change editable parameters here
**************************************************************************************************************
**************************************************************************************************************

<parameters>
/showsummaryfeedback = true
/ISI = 250
</parameters>

**************************************************************************************************************
**************************************************************************************************************
EDITABLE STIMULI: change editable stimuli here
**************************************************************************************************************
**************************************************************************************************************
This sample IAT can be easily adapted to different target categories
and attributes. To change the categories, you need only change the
stimulus items and labels immediately below this line.

***********************************************************************
<item attributeAlabel>
/1 = "Good"
</item>

<item attributeA>
/1 = "Marvelous"
/2 = "Superb"
/3 = "Pleasure"
/4 = "Beautiful"
/5 = "Joyful"
/6 = "Glorious"
/7 = "Lovely"
/8 = "Wonderful"
</item>

<item attributeBlabel>
/1 = "Bad"
</item>

<item attributeB>
/1 = "Tragic"
/2 = "Horrible"
/3 = "Agony"
/4 = "Painful"
/5 = "Terrible"
/6 = "Awful"
/7 = "Humiliate"
/8 = "Nasty"
</item>

<item targetAlabel>
/1 = "White American"
</item>

<item targetA>
/1 = "wf2_nc.jpg"
/2 = "wf3_nc.jpg"
/3 = "wf6_nc.jpg"
/4 = "wm1_nc.jpg"
/5 = "wm4_nc.jpg"
/6 = "wm6_nc.jpg"
</item>

<item targetBlabel>
/1 = "Black American"
</item>

<item targetB>
/1 = "bf14_nc.jpg"
/2 = "bf23_nc.jpg"
/3 = "bf56_nc.jpg"
/4 = "bm14_nc.jpg"
/5 = "bm23_nc.jpg"
/6 = "bm56_nc.jpg"
</item>


**************************************************************************************************************
**************************************************************************************************************
EDITABLE INSTRUCTIONS: change instructions here
**************************************************************************************************************
**************************************************************************************************************
<instruct>
/ fontstyle = ("Arial", 2.8%, false, false, false, false, 5, 1)
/ txcolor = (black)


/ screencolor = black
</instruct>


<htmlpage iatintro>
/ file = "intro_pictureiat.htm"
</htmlpage>

<item instructions>
/ 1 = "Put your left finger on the 'E' response key for items that belong to the category '<%expressions.leftTarget%>'.
Put your right finger on the 'I' response key for items that belong to the category '<%expressions.rightTarget%>'.
~nItems will appear one-by-one in the middle of the screen.
~nIf you make an error, a red X will appear - to continue, press the other response key.
~nGo as fast as you can while making as few errors as possible."

/ 2 = "Put your left finger on the 'E' response key for items that belong to the category '<%item.attributeAlabel.item(1)%>'.
Put your right finger on the 'I' response key for items that belong to the category '<%item.attributeBlabel.item(1)%>'.
~nIf you make an error, a red X will appear - to continue, press the other response key.
~nGo as fast as you can while making as few errors as possible."

/ 3 = "Press the left 'E' key for '<%item.attributeAlabel.item(1)%>' and '<%expressions.leftTarget%>'.
Press the right 'I' key for '<%item.attributeBlabel.item(1)%>' and '<%expressions.rightTarget%>'.
~nEach item belongs to only one category.
~nIf you make an error, a red X will appear - to continue, press the other response key.
~nGo as fast as you can while making as few errors as possible."

/ 4 = "This is the same task as the previous one.
~n~nPress the left 'E' key for '<%item.attributeAlabel.item(1)%>' and '<%expressions.leftTarget%>'.
Press the right 'I' key for '<%item.attributeBlabel.item(1)%>' and '<%expressions.rightTarget%>'.
~nEach item belongs to only one category.
~nGo as fast as you can while making as few errors as possible."

/ 5 = "Attention! The labels have changed sides.
~nPress the left 'E' key for '<%expressions.rightTarget%>'.
Press the right 'I' key for '<%expressions.leftTarget%>'.
~nGo as fast as you can while making as few errors as possible."

/ 6 = "Press the left 'E' key for '<%item.attributeAlabel.item(1)%>' and '<%expressions.rightTarget%>'.
Press the right 'I' key for '<%item.attributeBlabel.item(1)%>' and '<%expressions.leftTarget%>'.
~nIf you make an error, a red X will appear - to continue, press the other response key.
~nGo as fast as you can while making as few errors as possible."

/ 7 = "This is the same task as the previous one.
~nPress the left 'E' key for '<%item.attributeAlabel.item(1)%>' and '<%expressions.rightTarget%>'.
Press the right 'I' key for '<%item.attributeBlabel.item(1)%>' and '<%expressions.leftTarget%>'.
~nEach item belongs to only one category.
~nGo as fast as you can while making as few errors as possible."
</item>


Note: expressions used to assign the correct label to the left and right response keys
<expressions>
/leftTarget = if(mod(script.groupid, 2) != 0){
item.targetAlabel.item(1);
} else {
item.targetBlabel.item(1);
};
/rightTarget = if (mod(script.groupid, 2) != 0){
item.targetBlabel.item(1);
} else {
item.targetAlabel.item(1);
};
</expressions>

<text spacebar>
/ items = ("Press the SPACE BAR to begin.")
/ position = (50%, 90%)
/ valign = bottom
</text>

<text errorReminder>
/ items = ("If you make an error, a red X will appear. Press the other key to continue.")
/ position = (50%, 95%)
/ valign = bottom
/ fontstyle = ("Arial", 3%, false, false, false, false, 5, 1)
/ txcolor = gray
/ erase = false
</text>

***********************************************************************
Performance summary
***********************************************************************

<trial summary>
/ stimulustimes = [0=summary]
/ validresponse = (" ")
/ recorddata = false
/ ontrialbegin = [values.magnitude = "little to no"]
/ ontrialbegin = [if( abs(expressions.d) > 0.15 ) values.magnitude = "a slight"]
/ ontrialbegin = [if( abs(expressions.d) > 0.35 ) values.magnitude = "a moderate"]
/ ontrialbegin = [if( abs(expressions.d) >= 0.65 ) values.magnitude = "a strong"]
/ ontrialbegin = [if (expressions.d >= 0.0) values.preferred = item.targetALabel.1]
/ ontrialbegin = [if (expressions.d < 0.0) values.preferred = item.targetBLabel.1]
/ ontrialbegin = [if (expressions.d < 0.0) values.notpreferred= item.targetALabel.1]
/ ontrialbegin = [if (expressions.d >= 0.0) values.notpreferred= item.targetBLabel.1]
</trial>

<text summary>
/ items = ("Your IAT score (D) was <% expressions.d %>, which suggests <% values.magnitude %> automatic preference for <% values.preferred %> compared to <% values.notpreferred %>.~n~n~nPress the spacebar to complete this session.")
/ size = (60%, 60%)
/ hjustify = left
</text>

**************************************************************************************************************
!!!REMAINING CODE: Customize after careful consideration only!!!
**************************************************************************************************************


**************************************************************************************************************
**************************************************************************************************************
DEFAULTS
**************************************************************************************************************
**************************************************************************************************************
script requires Inquisit 5.0.7.0 or higher

<defaults>
/ fontstyle = ("Arial", 3.5%)
/ screencolor = black
/ txbgcolor = black
/ txcolor = white
/ minimumversion = "5.0.7.0"
/ canvasaspectratio = (4, 3)
</defaults>

**************************************************************************************************************
**************************************************************************************************************
DATA
**************************************************************************************************************
**************************************************************************************************************

Note: data file explanations under User Manual Information at the top

***********************
raw data file
***********************
<data>
/ columns = (build, computer.platform, date, time, group, subject, blockcode, blocknum, trialcode, trialnum, response, correct, latency,
stimulusnumber, stimulusitem, expressions.da, expressions.db, expressions.d, expressions.percentcorrect)
/ separatefiles = true
</data>

****************
summary data
****************

<summarydata>
/ columns = (script.startdate, script.starttime, script.subjectid, script.groupid, script.elapsedtime, computer.platform, values.completed,
expressions.da, expressions.db, expressions.d, expressions.percentcorrect)
/ separatefiles = true
</summarydata>

**************************************************************************************************************
**************************************************************************************************************
VALUES: automatically updated
**************************************************************************************************************
**************************************************************************************************************
            
/completed:0 = script was not completed; 1 = script was completed (all conditions run)

/ sum1a:tracks the sum of the latencies to correct responses (latencies <= 10000ms) for the first compatible block 1A
Note: by design, all final trial responses are correct (regardless of accuracy of initial response)
/ sum2a:tracks the sum of the latencies to correct responses (latencies <= 10000ms) for the first incompatible block 2A
Note: by design, all final trial responses are correct (regardless of accuracy of initial response)
/ sum1b:tracks the sum of the latencies to correct responses (latencies <= 10000ms) for the second compatible block 1B
Note: by design, all final trial responses are correct (regardless of accuracy of initial response)
/ sum2b:tracks the sum of the latencies to correct responses (latencies <= 10000ms) for the second incompatible block 2B
Note: by design, all final trial responses are correct (regardless of accuracy of initial response)
/ n1a:counts the number of trials in first compatible block 1A (except first one)
/ n2a:counts the number of trials in first incompatible block 2A (except first one)
/ n1b:counts the number of trials in second compatible block 1B
/ n2b:counts the number of trials in second incompatible block 2B
/ ss1a:tracks the sum of the squared latencies to correct responses (latencies <= 10000ms) in the first compatible block
/ ss2atracks the sum of the squared latencies to correct responses (latencies <= 10000ms) in the first incompatible block
/ ss1b:tracks the sum of the squared latencies to correct responses (latencies <= 10000ms) in the second compatible block
/ ss2b:tracks the sum of the squared latencies to correct responses (latencies <= 10000ms) in the second incompatible block
/ magnitude:stores the magnitude of the implicit preference: "little to no", "a slight", "a moderate", "a strong"
/ preferred:stores the preferred target category
/ notpreferred :stores the non preferred target category
/ n_correct:counts all initial correct responses of all trials that count towards D score

<values>
/ completed = 0
/ sum1a = 0
/ sum2a = 0
/ sum1b = 0
/ sum2b = 0
/ n1a = 0
/ n2a = 0
/ n1b = 0
/ n2b = 0
/ ss1a = 0
/ ss2a = 0
/ ss1b = 0
/ ss2b = 0
/ magnitude = "unknown"
/ preferred = "unknown"
/ notpreferred = "unknown"
/ n_correct = 0
/progresswidth = 0
/instructionIndex = 0</values>

**************************************************************************************************************
**************************************************************************************************************
EXPRESSIONS
**************************************************************************************************************
**************************************************************************************************************

* 1 is compatible, 2 is incompatible
* a is first block, b is second block

/ m1a:mean latencies of correct responses in first compatible block
/ m2a:mean latencies of correct responses in first incompatible block
/ m1b:mean latencies of correct responses in second compatible block
/ m2b:mean latencies of correct responses in second incompatible block
/ sd1a:standard deviation of latencies of correct responses in first compatible block
/ sd2astandard deviation of latencies of correct responses in first incompatible block
/ sd1b:standard deviation of latencies of correct responses in second compatible block
/ sd2b:standard deviation of latencies of correct responses in second incompatible block
/ sdastandarddeviation of latencies in first block
/ sdb standarddeviation of latencies in second block
/ daBigGrin-score for first blocks
/ dbBigGrin-score for second blocks
/ d:overall D-score
/ percentcorrect:   calculates the overall percent correct score of initial responses of test trials of D-score qualifying latencies
/progress:sets the length of the progress bar to %

<expressions>
/ m1a = values.sum1a / values.n1a
/ m2a = values.sum2a / values.n2a
/ m1b = values.sum1b / values.n1b
/ m2b = values.sum2b / values.n2b
/ sd1a = sqrt((values.ss1a - (values.n1a * (expressions.m1a * expressions.m1a))) / (values.n1a - 1))
/ sd2a = sqrt((values.ss2a - (values.n2a * (expressions.m2a * expressions.m2a))) / (values.n2a - 1))
/ sd1b = sqrt((values.ss1b - (values.n1b * (expressions.m1b * expressions.m1b))) / (values.n1b - 1))
/ sd2b = sqrt((values.ss2b - (values.n2b * (expressions.m2b * expressions.m2b))) / (values.n2b - 1))
/ sda = sqrt((((values.n1a - 1) * (expressions.sd1a * expressions.sd1a) + (values.n2a - 1) * (expressions.sd2a * expressions.sd2a)) + ((values.n1a + values.n2a) * ((expressions.m1a - expressions.m2a) * (expressions.m1a - expressions.m2a)) / 4) ) / (values.n1a + values.n2a - 1) )
/ sdb = sqrt((((values.n1b - 1) * (expressions.sd1b * expressions.sd1b) + (values.n2b - 1) * (expressions.sd2b * expressions.sd2b)) + ((values.n1b + values.n2b) * ((expressions.m1b - expressions.m2b) * (expressions.m1b - expressions.m2b)) / 4) ) / (values.n1b + values.n2b - 1) )
/ da = (m2a - m1a) / expressions.sda
/ db = (m2b - m1b) / expressions.sdb
/ d = (expressions.da + expressions.db) / 2
/ percentcorrect = (values.n_correct/ (values.n1a + values.n1b + values.n2a + values.n2b)) * 100
/progress = 1% * values.progresswidth
</expressions>

**************************************************************************************************************
**************************************************************************************************************
INSTRUCTIONS
**************************************************************************************************************
**************************************************************************************************************
<text instructions>
/ items = instructions
/ position = (10%, 25%)
/ halign = left
/ valign = top
/ hjustify = left
/ vjustify = center
/ size = (80%, 50%)
/ select = values.instructionIndex
</text>

<trial instructions>
/ ontrialbegin = [
values.progresswidth += 10;
values.instructionIndex += 1;
]
/ stimulustimes = [1=instructions, spacebar, progressbar, progressbar_fill]
/ correctresponse = (57)
/ recorddata = false
</trial>

**************************************************************************************************************
**************************************************************************************************************
STIMULI
**************************************************************************************************************
**************************************************************************************************************
<shape progressbar>
/shape = rectangle
/ size = (70%, 2%)
/ color = gray
/ position = (15%, 95%)
/ halign = left
/ valign = top
</shape>

<shape progressbar_fill>
/shape = rectangle
/ size = (expressions.progress, 2%)
/ color = green
/ position = (15%, 95%)
/ halign = left
/ valign = top
</shape>

<text attributeA>
/ items = attributeA
/ fontstyle = ("Arial", 5%)
/ txcolor = green
</text>

<text attributeB>
/ items = attributeB
/ fontstyle = ("Arial", 5%)
/ txcolor = green
</text>

<picture targetB>
/ items = targetB
/ size = (20%, 20%)
</picture>

<picture targetA>
/ items = targetA
/ size = (20%, 20%)
</picture>

<text error>
/ position = (50%, 75%)
/ items = ("X")
/ color = red
/ fontstyle = ("Arial", 10%, true)
</text>

<text attributeAleft>
/ items = attributeAlabel
/ valign = top
/ halign = left
/ position = (5%, 5%)
/ txcolor = green
/ fontstyle = ("Arial", 5%)
</text>

<text attributeBright>
/ items = attributeBlabel
/ valign = top
/ halign = right
/ position = (95%, 5%)
/ txcolor = green
/ fontstyle = ("Arial", 5%)
</text>

<text targetBleft>
/ items = targetBlabel
/ valign = top
/ halign = left
/ position = (5%, 5%)
/ fontstyle = ("Arial", 5%)
</text>

<text targetBright>
/ items = targetBlabel
/ valign = top
/ halign = right
/ position = (95%, 5%)
/ fontstyle = ("Arial", 5%)
</text>

<text targetBleftmixed>
/ items = targetBlabel
/ valign = top
/ halign = left
/ position = (5%, 19%)
/ fontstyle = ("Arial", 5%)
</text>

<text targetBrightmixed>
/ items = targetBlabel
/ valign = top
/ halign = right
/ position = (95%, 19%)
/ fontstyle = ("Arial", 5%)
</text>

<text targetAleft>
/ items = targetAlabel
/ valign = top
/ halign = left
/ position = (5%, 5%)
/ fontstyle = ("Arial", 5%)
</text>

<text targetAright>
/ items = targetAlabel
/ valign = top
/ halign = right
/ position = (95%, 5%)
/ fontstyle = ("Arial", 5%)
</text>

<text targetAleftmixed>
/ items = targetAlabel
/ valign = top
/ halign = left
/ position = (5%, 19%)
/ fontstyle = ("Arial", 5%)
</text>

<text targetArightmixed>
/ items = targetAlabel
/ valign = top
/ halign = right
/ position = (95%, 19%)
/ fontstyle = ("Arial", 5%)
</text><text orleft>
/ items = ("or")
/ valign = top
/ halign = left
/ position = (5%, 12%)
/ fontstyle = ("Arial", 5%)
</text>

<text orright>
/ items = ("or")
/ valign = top
/ halign = right
/ position = (95%, 12%)
/ fontstyle = ("Arial", 5%)
</text>


**************************************************************************************************************
**************************************************************************************************************
TRIALS
**************************************************************************************************************
**************************************************************************************************************

<trial attributeA>
/ validresponse = ("E", "I")
/ correctresponse = ("E")
/ stimulusframes = [1 = attributeA, errorReminder]
/ posttrialpause = parameters.ISI
</trial>

<trial attributeB>
/ validresponse = ("E", "I")
/ correctresponse = ("I")
/ stimulusframes = [1 = attributeB, errorReminder]
/ posttrialpause = parameters.ISI
</trial>

<trial targetBleft>
/ validresponse = ("E", "I")
/ correctresponse = ("E")
/ stimulusframes = [1 = targetB, errorReminder]
/ posttrialpause = parameters.ISI
</trial>

<trial targetBright>
/ validresponse = ("E", "I")
/ correctresponse = ("I")
/ stimulusframes = [1 = targetB, errorReminder]
/ posttrialpause = parameters.ISI
</trial>

<trial targetAleft>
/ validresponse = ("E", "I")
/ correctresponse = ("E")
/ stimulusframes = [1 = targetA, errorReminder]
/ posttrialpause = parameters.ISI
</trial>

<trial targetAright>
/ validresponse = ("E", "I")
/ correctresponse = ("I")
/ stimulusframes = [1 = targetA, errorReminder]
/ posttrialpause = parameters.ISI
</trial>

**************************************************************************************************************
**************************************************************************************************************
BLOCKS
**************************************************************************************************************
**************************************************************************************************************

<block attributepractice>
/ bgstim = (attributeAleft, attributeBright)
/ trials = [
1=instructions;
2-21 = random(attributeA, attributeB);
]
/ errormessage = true(error,200)
/ responsemode = correct
</block>

<block targetcompatiblepractice>
/ bgstim = (targetAleft, targetBright)
/ trials = [
1=instructions;
2-21 = random(targetAleft, targetBright);
]
/ errormessage = true(error,200)
/ responsemode = correct
</block>

<block targetincompatiblepractice>
/ bgstim = (targetAright, targetBleft)
/ trials = [
1=instructions;
2-21 = random(targetAright, targetBleft);
]
/ errormessage = true(error,200)
/ responsemode = correct
</block>

<block targetcompatiblepracticeswitch>
/ bgstim = (targetAleft, targetBright)
/ trials = [
1=instructions;
2-41 = random(targetAleft, targetBright);
]
/ errormessage = true(error,200)
/ responsemode = correct
</block>

<block targetincompatiblepracticeswitch>
/ bgstim = (targetAright, targetBleft)
/ trials = [
1=instructions;
2-41 = random(targetAright, targetBleft);
]
/ errormessage = true(error,200)
/ responsemode = correct
</block>

<block compatibletest1>
/ bgstim = (targetAleftmixed, orleft, attributeAleft, targetBrightmixed, orright, attributeBright)
/ trials = [1=instructions;
3,5,7,9,11,13,15,17,19,21= random(targetAleft, targetBright);
2,4,6,8,10,12,14,16,18,20 = random(attributeA, attributeB)]
/ errormessage = true(error,200)
/ responsemode = correct
/ ontrialend = [
if(block.compatibletest1.latency <= 10000 && block.compatibletest1.currenttrialnumber != 1 ) values.sum1a = values.sum1a + block.compatibletest1.latency;
if(block.compatibletest1.latency <= 10000 && block.compatibletest1.currenttrialnumber != 1 ) values.n1a += 1;
if(block.compatibletest1.latency <= 10000 && block.compatibletest1.currenttrialnumber != 1 ) values.ss1a = values.ss1a + (block.compatibletest1.latency * block.compatibletest1.latency);
if(block.compatibletest1.latency <= 10000 && block.compatibletest1.currenttrialnumber != 1 ) values.n_correct += block.compatibletest1.correct;
]
</block>

<block compatibletest2>
/ bgstim = (targetAleftmixed, orleft, attributeAleft, targetBrightmixed, orright, attributeBright)
/ trials = [
2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40 = random(targetAleft, targetBright);
1,3,5,7,9,11,13,15,17,19,21,23,25,27,29,31,33,35,37,39 = random(attributeA, attributeB)]
/ errormessage = true(error,200)
/ responsemode = correct
/ ontrialend = [
if(block.compatibletest2.latency <= 10000) values.sum1b = values.sum1b + block.compatibletest2.latency;
if(block.compatibletest2.latency <= 10000) values.n1b += 1;
if(block.compatibletest2.latency <= 10000) values.ss1b = values.ss1b + (block.compatibletest2.latency * block.compatibletest2.latency);
if(block.compatibletest2.latency <= 10000) values.n_correct += block.compatibletest2.correct;
]
</block>

<block incompatibletest1>
/ bgstim = (targetBleftmixed, orleft, attributeAleft, targetArightmixed, orright, attributeBright)
/ trials = [1=instructions;
3,5,7,9,11,13,15,17,19,21 = random(targetBleft, targetAright);
2,4,6,8,10,12,14,16,18,20 = random(attributeA, attributeB)]
/ errormessage = true(error,200)
/ responsemode = correct
/ ontrialend = [
if(block.incompatibletest1.latency <= 10000 && block.incompatibletest1.currenttrialnumber != 1) values.sum2a = values.sum2a + block.incompatibletest1.latency;
if(block.incompatibletest1.latency <= 10000 && block.incompatibletest1.currenttrialnumber != 1 ) values.n2a += 1;
if(block.incompatibletest1.latency <= 10000 && block.incompatibletest1.currenttrialnumber != 1 ) values.ss2a = values.ss2a + (block.incompatibletest1.latency * block.incompatibletest1.latency);
if(block.incompatibletest1.latency <= 10000 && block.incompatibletest1.currenttrialnumber != 1 ) values.n_correct += block.incompatibletest1.correct;
]
</block>

<block incompatibletest2>
/ bgstim = (targetBleftmixed, orleft, attributeAleft, targetArightmixed, orright, attributeBright)
/ trials = [
2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40 = random(targetBleft, targetAright);
1,3,5,7,9,11,13,15,17,19,21,23,25,27,29,31,33,35,37,39 = random(attributeA, attributeB)]
/ errormessage = true(error,200)
/ responsemode = correct
/ ontrialend = [
if(block.incompatibletest2.latency <= 10000) values.sum2b = values.sum2b + block.incompatibletest2.latency;
if(block.incompatibletest2.latency <= 10000) values.n2b += 1;
if(block.incompatibletest2.latency <= 10000) values.ss2b = values.ss2b + (block.incompatibletest2.latency * block.incompatibletest2.latency);
if(block.incompatibletest2.latency <= 10000) values.n_correct += block.incompatibletest2.correct;
]
</block>

<block compatibletestinstructions>
/ bgstim = (targetAleftmixed, orleft, attributeAleft, targetBrightmixed, orright, attributeBright)
/ trials = [1=instructions]
/ recorddata = false
</block>

<block incompatibletestinstructions>
/ bgstim = (targetBleftmixed, orleft, attributeAleft, targetArightmixed, orright, attributeBright)
/ trials = [1=instructions]
/ recorddata = false
</block>

<block summary>
/skip = [parameters.showsummaryfeedback == false]
/ trials = [1=summary]
/ recorddata = false
</block>

**************************************************************************************************************
**************************************************************************************************************
EXPERIMENT
**************************************************************************************************************
**************************************************************************************************************
Groupassignment is done by groupnumber

<expt>
/ preinstructions = (iatintro)
/subjects = (1 of 2)
/groupassignment = groupnumber
/ blocks = [
1=targetcompatiblepractice;
2=attributepractice;
3=compatibletest1;
4=compatibletestinstructions;
5=compatibletest2;
6=targetincompatiblepractice;
7=incompatibletest1;
8=incompatibletestinstructions;
9=incompatibletest2;
10=summary;
]
/onexptend = [values.completed = 1]
</expt>

<expt>
/ preinstructions = (iatintro)
/subjects = (2 of 2)
/groupassignment = groupnumber
/ blocks = [
1=targetincompatiblepractice;
2=attributepractice;
3=incompatibletest1;
4=incompatibletestinstructions;
5=incompatibletest2;
6=targetcompatiblepractice;
7=compatibletest1;
8=compatibletestinstructions;
9=compatibletest2;
10=summary;
]
/onexptend = [values.completed = 1]
</expt>

***********************************************************************
Test Monkey
***********************************************************************
<monkey>
/ latencydistribution = normal(500, 100)
/ percentcorrect = 90
</monkey>
**************************************************************************************************************
End of File


If you wish to run the first condition only, then the easiest way is to simply eliminate the 2nd <expt> element entirely; the <expt> elements are where condition assignment happens. The first <expt> runs the the compatible condition, first  so you'll want to keep that, the 2nd <expt> runs the incompatible condition first, that one you'll want to delete.

I.e. in your script change

<expt>
/ preinstructions = (iatintro)
/subjects = (1 of 2)
/groupassignment = groupnumber
/ blocks = [
1=targetcompatiblepractice;
2=attributepractice;
3=compatibletest1;
4=compatibletestinstructions;
5=compatibletest2;
6=targetincompatiblepractice;
7=incompatibletest1;
8=incompatibletestinstructions;
9=incompatibletest2;
10=summary;
]
/onexptend = [values.completed = 1]
</expt>

<expt>
/ preinstructions = (iatintro)
/subjects = (2 of 2)
/groupassignment = groupnumber
/ blocks = [
1=targetincompatiblepractice;
2=attributepractice;
3=incompatibletest1;
4=incompatibletestinstructions;
5=incompatibletest2;
6=targetcompatiblepractice;
7=compatibletest1;
8=compatibletestinstructions;
9=compatibletest2;
10=summary;
]
/onexptend = [values.completed = 1]
</expt>

to

<expt>
/ preinstructions = (iatintro)
/subjects = (1 of 1)
/groupassignment = groupnumber
/ blocks = [
1=targetcompatiblepractice;
2=attributepractice;
3=compatibletest1;
4=compatibletestinstructions;
5=compatibletest2;
6=targetincompatiblepractice;
7=incompatibletest1;
8=incompatibletestinstructions;
9=incompatibletest2;
10=summary;
]
/onexptend = [values.completed = 1]
</expt>

only.

bkorsmo
bkorsmo
Associate Member
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Group: Forum Members
Posts: 7, Visits: 86
Dave - Wednesday, November 14, 2018
bkorsmo - Tuesday, November 13, 2018
I am running the Racism IAT which is counterbalanced between even and odd group numbers. I need to run subjects through the odd numbered, target compatible 1st, target incompatible 2nd,  every time. How do I run group numbers 1 and 3 only?

I am scared to alter the Racism IAT script and do not how to perform URL parameters in Inquisit Web to assign group IDs.

Is there an easy fix? Help, many thanks, Ben.

raceiat.iqx:

<usermanual>

Race Implicit Attitude Test (IAT) - with pictures
SCRIPT INFO

Main Inquisit programming: Sean Draine (seandr@millisecond.com)
last updated: 02-12-2018 by K.Borchert (katjab@millisecond.com) for Millisecond Software LLC

Script Copyright © 02-12-2018 Millisecond Software


BACKGROUND INFO

The Implicit Association Task (Greenwald, McGhee, & Schwartz, 1998) is a widely-used cognitive-behavioral paradigm
that measures the strength of automatic (implicit) associations between concepts in people’s minds relying
on latency measures in a simple sorting task.

The strength of an association between concepts is measured by the standardized mean difference score of
the 'hypothesis-inconsistent' pairings and 'hypothesis-consistent' pairings (d-score) (Greenwald, Nosek, & Banaji, 2003).
In general, the higher the d-score the stronger is the association between the 'hypothesis-consistent' pairings
(decided by researchers). Negative d-scores suggest a stronger association between the 'hypothesis-inconsistent' pairings.

Inquisit calculates d-scores using the improved scoring algorithm as described in Greenwald et al (2003).
Error trials are handled by requiring respondents to correct their responses according to recommendation (p.214).

D-scores obtained with this script:
Positive d-scores: support a stronger association between 'White American-Good' and 'Black American-Bad' than for the opposite pairings
Negative d-scores: support a stronger association between 'Black American-Good' and 'White American-Bad' than for the opposite pairings

References:

general IAT:
Greenwald, A. G., McGhee, D. E., & Schwartz, J. K. L. (1998). Measuring individual differences in implicit cognition:
The Implicit Association Test. Journal of Personality and Social Psychology, 74, 1464-1480.

Greenwald, A. G., Nosek, B. A., & Banaji, M. R. (2003). Understanding and Using the Implicit Association Test:
I. An Improved Scoring Algorithm. Journal of Personality and Social Psychology, 85, 197-216.

Stimuli: This script is based on the generic Inquisit IAT template and uses the pictures from Project Implicit's Race IAT
(Retrieved from osf.io/y9hiq)


*Task*
Participants are asked to categorize attributes (e.g. "joyful"; "tragic") and target items (e.g pictures of Black Americans and White Americans)
into predetermined categories via keystroke presses. The basic task is to press a left key (E) if an item (e.g. "joyful")
belongs to the category presented on the left (e.g. "Good") and to press the right key (I) if the word (e.g. "tragic")
belongs to the category ("Bad") presented on the right.
For practice, participants sort items into the target categories "Black Americans vs. White Americans" and the attribute categories "Good vs. Bad".
For the test, participants are asked to sort categories into the paired/combined categories (e.g.
"White Americans OR Good" on the left vs. "Black Americans OR Bad" on the right). Pairings are reversed for a second test
(e.g. "Black Americans OR Good" on the left vs. "White Americans OR Bad" on the right). Order is counterbalanced by groupnumber.


DATA FILE INFORMATION:
The default data stored in the data files are:

(1) Raw data file: 'RaceIAT_raw*.iqdat' (a separate file for each participant)

build:Inquisit build
computer.platform:the platform the script was run on
date, time, subject, group:date and time script was run with the current subject/groupnumber
Note: group1/group2 counterbalance the order in which the pairings are run
blockcode, blocknum:the name and number of the current block
trialcode, trialnum: the name and number of the currently recorded trial
(Note: not all trials that are run might record data; by default data is collected unless /recorddata = false is set for a particular trial/block)
response:the final trial response (scancodes of the keys pressed)
Note: script saves the final and -by design- correct response
correct:the accuracy of the initial response
0 = initial response was incorrect and needed to be corrected
1 = initial response is correct
latency:the latency of the final (correct) response in ms
stimulusnumber:the number of the current stimulus
stimulusitem:the currently presented item
expressions.da:d-score of the first short blocks
expressions.db:d-score of the second long blocks
expressions.d:overall d-score(non-weighted mean of the 2 d-scores)
/ percentcorrect:   the overall percent correct score of initial responses of test trials of D-score qualifying latencies

(2) Summary data file: 'RaceIAT_summary*.iqdat' (a separate file for each participant)

script.startdate:date script was run
script.starttime:time script was started
script.subjectid:subject id number
script.groupid:group id number
script.elapsedtime:time it took to run script (in ms)
computer.platform:the platform the script was run on
/completed:0 = script was not completed (prematurely aborted); 1 = script was completed (all conditions run)
expressions.da:d-score of the first blocks
expressions.db:d-score of the second blocks
expressions.d:overall d-score
/ percentcorrect:   the overall percent correct score of initial responses of test trials of D-score qualifying latencies



EXPERIMENTAL SET-UP

Hypothesis-consistent pairings vs. hypothesis-inconsistent pairings; tested within-subjects
=> order is counterbalanced by groupnumber assignment

Block Sequence:
1. Target Category sorting training
2. Attribute sorting training
3. 1. Test Block of hypothesis-consistent* pairings with 20 trials (half the participant start with inconsistent pairings)
4. 2. Test Block of hypothesis-consistent pairings with 40 trials
5. Target Category sorting training with targets switching sides
6. 1. Test Block of hypothesis-inconsistent pairings with 20 trials
7. 2. Test Block of hypothesis-inconsistent pairings with 40 trials

In all Test Blocks:
* attributes and targets alternate
* attributes as well as targets are randomly selected without replacement

Trial Sequence:
Target -> until correct response -> ISI: 250ms (default)-> Target....STIMULI
Stimuli can be edited under section Editable Stimuli


INSTRUCTIONS
* start instruction page is provided as an html page. It automatically adapts to different images and category labels UNLESS
the number of attributes and/or targets have been changed. In this case, changes have to be
made to file "intro_iat.htm", so that the correct number of items are presented in the overview table.

Example: instead of 8 words for target A, only 5 should be presented:

in file "intro_iat.htm":
change:
<td><%item.targetA.item(1)%>, <%item.targetA.item(2)%>, <%item.targetA.item(3)%>, <%item.targetA.item(4)%>,
<%item.targetA.item(5)%>, <%item.targetA.item(6)%>, <%item.targetA.item(7)%>, <%item.targetA.item(8)%>
</td>

To:
<td><%item.targetA.item(1)%>, <%item.targetA.item(2)%>, <%item.targetA.item(3)%>, <%item.targetA.item(4)%>,
<%item.targetA.item(5)%>
</td>

* item.instructions under section 'Editable Instructions' contains the the trial instructions
The instructions adapt automatically if different attributes and targets are used.


EDITABLE CODE:
check below for (relatively) easily editable parameters, stimuli, instructions etc.
Keep in mind that you can use this script as a template and therefore always "mess" with the entire code to further customize your experiment.

The parameters you can change are:

/showsummaryfeedback:set parameter showsummaryfeedback = true to display summary feedback to participants at the end (default)
set parameter showsummaryfeedback = false if no summary feedback should be presented to participants
/ISI:interstimulus interval (in ms) (default: 250ms)
</usermanual>


**************************************************************************************************************
**************************************************************************************************************
EDITABLE PARAMETERS: change editable parameters here
**************************************************************************************************************
**************************************************************************************************************

<parameters>
/showsummaryfeedback = true
/ISI = 250
</parameters>

**************************************************************************************************************
**************************************************************************************************************
EDITABLE STIMULI: change editable stimuli here
**************************************************************************************************************
**************************************************************************************************************
This sample IAT can be easily adapted to different target categories
and attributes. To change the categories, you need only change the
stimulus items and labels immediately below this line.

***********************************************************************
<item attributeAlabel>
/1 = "Good"
</item>

<item attributeA>
/1 = "Marvelous"
/2 = "Superb"
/3 = "Pleasure"
/4 = "Beautiful"
/5 = "Joyful"
/6 = "Glorious"
/7 = "Lovely"
/8 = "Wonderful"
</item>

<item attributeBlabel>
/1 = "Bad"
</item>

<item attributeB>
/1 = "Tragic"
/2 = "Horrible"
/3 = "Agony"
/4 = "Painful"
/5 = "Terrible"
/6 = "Awful"
/7 = "Humiliate"
/8 = "Nasty"
</item>

<item targetAlabel>
/1 = "White American"
</item>

<item targetA>
/1 = "wf2_nc.jpg"
/2 = "wf3_nc.jpg"
/3 = "wf6_nc.jpg"
/4 = "wm1_nc.jpg"
/5 = "wm4_nc.jpg"
/6 = "wm6_nc.jpg"
</item>

<item targetBlabel>
/1 = "Black American"
</item>

<item targetB>
/1 = "bf14_nc.jpg"
/2 = "bf23_nc.jpg"
/3 = "bf56_nc.jpg"
/4 = "bm14_nc.jpg"
/5 = "bm23_nc.jpg"
/6 = "bm56_nc.jpg"
</item>


**************************************************************************************************************
**************************************************************************************************************
EDITABLE INSTRUCTIONS: change instructions here
**************************************************************************************************************
**************************************************************************************************************
<instruct>
/ fontstyle = ("Arial", 2.8%, false, false, false, false, 5, 1)
/ txcolor = (black)


/ screencolor = black
</instruct>


<htmlpage iatintro>
/ file = "intro_pictureiat.htm"
</htmlpage>

<item instructions>
/ 1 = "Put your left finger on the 'E' response key for items that belong to the category '<%expressions.leftTarget%>'.
Put your right finger on the 'I' response key for items that belong to the category '<%expressions.rightTarget%>'.
~nItems will appear one-by-one in the middle of the screen.
~nIf you make an error, a red X will appear - to continue, press the other response key.
~nGo as fast as you can while making as few errors as possible."

/ 2 = "Put your left finger on the 'E' response key for items that belong to the category '<%item.attributeAlabel.item(1)%>'.
Put your right finger on the 'I' response key for items that belong to the category '<%item.attributeBlabel.item(1)%>'.
~nIf you make an error, a red X will appear - to continue, press the other response key.
~nGo as fast as you can while making as few errors as possible."

/ 3 = "Press the left 'E' key for '<%item.attributeAlabel.item(1)%>' and '<%expressions.leftTarget%>'.
Press the right 'I' key for '<%item.attributeBlabel.item(1)%>' and '<%expressions.rightTarget%>'.
~nEach item belongs to only one category.
~nIf you make an error, a red X will appear - to continue, press the other response key.
~nGo as fast as you can while making as few errors as possible."

/ 4 = "This is the same task as the previous one.
~n~nPress the left 'E' key for '<%item.attributeAlabel.item(1)%>' and '<%expressions.leftTarget%>'.
Press the right 'I' key for '<%item.attributeBlabel.item(1)%>' and '<%expressions.rightTarget%>'.
~nEach item belongs to only one category.
~nGo as fast as you can while making as few errors as possible."

/ 5 = "Attention! The labels have changed sides.
~nPress the left 'E' key for '<%expressions.rightTarget%>'.
Press the right 'I' key for '<%expressions.leftTarget%>'.
~nGo as fast as you can while making as few errors as possible."

/ 6 = "Press the left 'E' key for '<%item.attributeAlabel.item(1)%>' and '<%expressions.rightTarget%>'.
Press the right 'I' key for '<%item.attributeBlabel.item(1)%>' and '<%expressions.leftTarget%>'.
~nIf you make an error, a red X will appear - to continue, press the other response key.
~nGo as fast as you can while making as few errors as possible."

/ 7 = "This is the same task as the previous one.
~nPress the left 'E' key for '<%item.attributeAlabel.item(1)%>' and '<%expressions.rightTarget%>'.
Press the right 'I' key for '<%item.attributeBlabel.item(1)%>' and '<%expressions.leftTarget%>'.
~nEach item belongs to only one category.
~nGo as fast as you can while making as few errors as possible."
</item>


Note: expressions used to assign the correct label to the left and right response keys
<expressions>
/leftTarget = if(mod(script.groupid, 2) != 0){
item.targetAlabel.item(1);
} else {
item.targetBlabel.item(1);
};
/rightTarget = if (mod(script.groupid, 2) != 0){
item.targetBlabel.item(1);
} else {
item.targetAlabel.item(1);
};
</expressions>

<text spacebar>
/ items = ("Press the SPACE BAR to begin.")
/ position = (50%, 90%)
/ valign = bottom
</text>

<text errorReminder>
/ items = ("If you make an error, a red X will appear. Press the other key to continue.")
/ position = (50%, 95%)
/ valign = bottom
/ fontstyle = ("Arial", 3%, false, false, false, false, 5, 1)
/ txcolor = gray
/ erase = false
</text>

***********************************************************************
Performance summary
***********************************************************************

<trial summary>
/ stimulustimes = [0=summary]
/ validresponse = (" ")
/ recorddata = false
/ ontrialbegin = [values.magnitude = "little to no"]
/ ontrialbegin = [if( abs(expressions.d) > 0.15 ) values.magnitude = "a slight"]
/ ontrialbegin = [if( abs(expressions.d) > 0.35 ) values.magnitude = "a moderate"]
/ ontrialbegin = [if( abs(expressions.d) >= 0.65 ) values.magnitude = "a strong"]
/ ontrialbegin = [if (expressions.d >= 0.0) values.preferred = item.targetALabel.1]
/ ontrialbegin = [if (expressions.d < 0.0) values.preferred = item.targetBLabel.1]
/ ontrialbegin = [if (expressions.d < 0.0) values.notpreferred= item.targetALabel.1]
/ ontrialbegin = [if (expressions.d >= 0.0) values.notpreferred= item.targetBLabel.1]
</trial>

<text summary>
/ items = ("Your IAT score (D) was <% expressions.d %>, which suggests <% values.magnitude %> automatic preference for <% values.preferred %> compared to <% values.notpreferred %>.~n~n~nPress the spacebar to complete this session.")
/ size = (60%, 60%)
/ hjustify = left
</text>

**************************************************************************************************************
!!!REMAINING CODE: Customize after careful consideration only!!!
**************************************************************************************************************


**************************************************************************************************************
**************************************************************************************************************
DEFAULTS
**************************************************************************************************************
**************************************************************************************************************
script requires Inquisit 5.0.7.0 or higher

<defaults>
/ fontstyle = ("Arial", 3.5%)
/ screencolor = black
/ txbgcolor = black
/ txcolor = white
/ minimumversion = "5.0.7.0"
/ canvasaspectratio = (4, 3)
</defaults>

**************************************************************************************************************
**************************************************************************************************************
DATA
**************************************************************************************************************
**************************************************************************************************************

Note: data file explanations under User Manual Information at the top

***********************
raw data file
***********************
<data>
/ columns = (build, computer.platform, date, time, group, subject, blockcode, blocknum, trialcode, trialnum, response, correct, latency,
stimulusnumber, stimulusitem, expressions.da, expressions.db, expressions.d, expressions.percentcorrect)
/ separatefiles = true
</data>

****************
summary data
****************

<summarydata>
/ columns = (script.startdate, script.starttime, script.subjectid, script.groupid, script.elapsedtime, computer.platform, values.completed,
expressions.da, expressions.db, expressions.d, expressions.percentcorrect)
/ separatefiles = true
</summarydata>

**************************************************************************************************************
**************************************************************************************************************
VALUES: automatically updated
**************************************************************************************************************
**************************************************************************************************************
            
/completed:0 = script was not completed; 1 = script was completed (all conditions run)

/ sum1a:tracks the sum of the latencies to correct responses (latencies <= 10000ms) for the first compatible block 1A
Note: by design, all final trial responses are correct (regardless of accuracy of initial response)
/ sum2a:tracks the sum of the latencies to correct responses (latencies <= 10000ms) for the first incompatible block 2A
Note: by design, all final trial responses are correct (regardless of accuracy of initial response)
/ sum1b:tracks the sum of the latencies to correct responses (latencies <= 10000ms) for the second compatible block 1B
Note: by design, all final trial responses are correct (regardless of accuracy of initial response)
/ sum2b:tracks the sum of the latencies to correct responses (latencies <= 10000ms) for the second incompatible block 2B
Note: by design, all final trial responses are correct (regardless of accuracy of initial response)
/ n1a:counts the number of trials in first compatible block 1A (except first one)
/ n2a:counts the number of trials in first incompatible block 2A (except first one)
/ n1b:counts the number of trials in second compatible block 1B
/ n2b:counts the number of trials in second incompatible block 2B
/ ss1a:tracks the sum of the squared latencies to correct responses (latencies <= 10000ms) in the first compatible block
/ ss2atracks the sum of the squared latencies to correct responses (latencies <= 10000ms) in the first incompatible block
/ ss1b:tracks the sum of the squared latencies to correct responses (latencies <= 10000ms) in the second compatible block
/ ss2b:tracks the sum of the squared latencies to correct responses (latencies <= 10000ms) in the second incompatible block
/ magnitude:stores the magnitude of the implicit preference: "little to no", "a slight", "a moderate", "a strong"
/ preferred:stores the preferred target category
/ notpreferred :stores the non preferred target category
/ n_correct:counts all initial correct responses of all trials that count towards D score

<values>
/ completed = 0
/ sum1a = 0
/ sum2a = 0
/ sum1b = 0
/ sum2b = 0
/ n1a = 0
/ n2a = 0
/ n1b = 0
/ n2b = 0
/ ss1a = 0
/ ss2a = 0
/ ss1b = 0
/ ss2b = 0
/ magnitude = "unknown"
/ preferred = "unknown"
/ notpreferred = "unknown"
/ n_correct = 0
/progresswidth = 0
/instructionIndex = 0</values>

**************************************************************************************************************
**************************************************************************************************************
EXPRESSIONS
**************************************************************************************************************
**************************************************************************************************************

* 1 is compatible, 2 is incompatible
* a is first block, b is second block

/ m1a:mean latencies of correct responses in first compatible block
/ m2a:mean latencies of correct responses in first incompatible block
/ m1b:mean latencies of correct responses in second compatible block
/ m2b:mean latencies of correct responses in second incompatible block
/ sd1a:standard deviation of latencies of correct responses in first compatible block
/ sd2astandard deviation of latencies of correct responses in first incompatible block
/ sd1b:standard deviation of latencies of correct responses in second compatible block
/ sd2b:standard deviation of latencies of correct responses in second incompatible block
/ sdastandarddeviation of latencies in first block
/ sdb standarddeviation of latencies in second block
/ daBigGrin-score for first blocks
/ dbBigGrin-score for second blocks
/ d:overall D-score
/ percentcorrect:   calculates the overall percent correct score of initial responses of test trials of D-score qualifying latencies
/progress:sets the length of the progress bar to %

<expressions>
/ m1a = values.sum1a / values.n1a
/ m2a = values.sum2a / values.n2a
/ m1b = values.sum1b / values.n1b
/ m2b = values.sum2b / values.n2b
/ sd1a = sqrt((values.ss1a - (values.n1a * (expressions.m1a * expressions.m1a))) / (values.n1a - 1))
/ sd2a = sqrt((values.ss2a - (values.n2a * (expressions.m2a * expressions.m2a))) / (values.n2a - 1))
/ sd1b = sqrt((values.ss1b - (values.n1b * (expressions.m1b * expressions.m1b))) / (values.n1b - 1))
/ sd2b = sqrt((values.ss2b - (values.n2b * (expressions.m2b * expressions.m2b))) / (values.n2b - 1))
/ sda = sqrt((((values.n1a - 1) * (expressions.sd1a * expressions.sd1a) + (values.n2a - 1) * (expressions.sd2a * expressions.sd2a)) + ((values.n1a + values.n2a) * ((expressions.m1a - expressions.m2a) * (expressions.m1a - expressions.m2a)) / 4) ) / (values.n1a + values.n2a - 1) )
/ sdb = sqrt((((values.n1b - 1) * (expressions.sd1b * expressions.sd1b) + (values.n2b - 1) * (expressions.sd2b * expressions.sd2b)) + ((values.n1b + values.n2b) * ((expressions.m1b - expressions.m2b) * (expressions.m1b - expressions.m2b)) / 4) ) / (values.n1b + values.n2b - 1) )
/ da = (m2a - m1a) / expressions.sda
/ db = (m2b - m1b) / expressions.sdb
/ d = (expressions.da + expressions.db) / 2
/ percentcorrect = (values.n_correct/ (values.n1a + values.n1b + values.n2a + values.n2b)) * 100
/progress = 1% * values.progresswidth
</expressions>

**************************************************************************************************************
**************************************************************************************************************
INSTRUCTIONS
**************************************************************************************************************
**************************************************************************************************************
<text instructions>
/ items = instructions
/ position = (10%, 25%)
/ halign = left
/ valign = top
/ hjustify = left
/ vjustify = center
/ size = (80%, 50%)
/ select = values.instructionIndex
</text>

<trial instructions>
/ ontrialbegin = [
values.progresswidth += 10;
values.instructionIndex += 1;
]
/ stimulustimes = [1=instructions, spacebar, progressbar, progressbar_fill]
/ correctresponse = (57)
/ recorddata = false
</trial>

**************************************************************************************************************
**************************************************************************************************************
STIMULI
**************************************************************************************************************
**************************************************************************************************************
<shape progressbar>
/shape = rectangle
/ size = (70%, 2%)
/ color = gray
/ position = (15%, 95%)
/ halign = left
/ valign = top
</shape>

<shape progressbar_fill>
/shape = rectangle
/ size = (expressions.progress, 2%)
/ color = green
/ position = (15%, 95%)
/ halign = left
/ valign = top
</shape>

<text attributeA>
/ items = attributeA
/ fontstyle = ("Arial", 5%)
/ txcolor = green
</text>

<text attributeB>
/ items = attributeB
/ fontstyle = ("Arial", 5%)
/ txcolor = green
</text>

<picture targetB>
/ items = targetB
/ size = (20%, 20%)
</picture>

<picture targetA>
/ items = targetA
/ size = (20%, 20%)
</picture>

<text error>
/ position = (50%, 75%)
/ items = ("X")
/ color = red
/ fontstyle = ("Arial", 10%, true)
</text>

<text attributeAleft>
/ items = attributeAlabel
/ valign = top
/ halign = left
/ position = (5%, 5%)
/ txcolor = green
/ fontstyle = ("Arial", 5%)
</text>

<text attributeBright>
/ items = attributeBlabel
/ valign = top
/ halign = right
/ position = (95%, 5%)
/ txcolor = green
/ fontstyle = ("Arial", 5%)
</text>

<text targetBleft>
/ items = targetBlabel
/ valign = top
/ halign = left
/ position = (5%, 5%)
/ fontstyle = ("Arial", 5%)
</text>

<text targetBright>
/ items = targetBlabel
/ valign = top
/ halign = right
/ position = (95%, 5%)
/ fontstyle = ("Arial", 5%)
</text>

<text targetBleftmixed>
/ items = targetBlabel
/ valign = top
/ halign = left
/ position = (5%, 19%)
/ fontstyle = ("Arial", 5%)
</text>

<text targetBrightmixed>
/ items = targetBlabel
/ valign = top
/ halign = right
/ position = (95%, 19%)
/ fontstyle = ("Arial", 5%)
</text>

<text targetAleft>
/ items = targetAlabel
/ valign = top
/ halign = left
/ position = (5%, 5%)
/ fontstyle = ("Arial", 5%)
</text>

<text targetAright>
/ items = targetAlabel
/ valign = top
/ halign = right
/ position = (95%, 5%)
/ fontstyle = ("Arial", 5%)
</text>

<text targetAleftmixed>
/ items = targetAlabel
/ valign = top
/ halign = left
/ position = (5%, 19%)
/ fontstyle = ("Arial", 5%)
</text>

<text targetArightmixed>
/ items = targetAlabel
/ valign = top
/ halign = right
/ position = (95%, 19%)
/ fontstyle = ("Arial", 5%)
</text><text orleft>
/ items = ("or")
/ valign = top
/ halign = left
/ position = (5%, 12%)
/ fontstyle = ("Arial", 5%)
</text>

<text orright>
/ items = ("or")
/ valign = top
/ halign = right
/ position = (95%, 12%)
/ fontstyle = ("Arial", 5%)
</text>


**************************************************************************************************************
**************************************************************************************************************
TRIALS
**************************************************************************************************************
**************************************************************************************************************

<trial attributeA>
/ validresponse = ("E", "I")
/ correctresponse = ("E")
/ stimulusframes = [1 = attributeA, errorReminder]
/ posttrialpause = parameters.ISI
</trial>

<trial attributeB>
/ validresponse = ("E", "I")
/ correctresponse = ("I")
/ stimulusframes = [1 = attributeB, errorReminder]
/ posttrialpause = parameters.ISI
</trial>

<trial targetBleft>
/ validresponse = ("E", "I")
/ correctresponse = ("E")
/ stimulusframes = [1 = targetB, errorReminder]
/ posttrialpause = parameters.ISI
</trial>

<trial targetBright>
/ validresponse = ("E", "I")
/ correctresponse = ("I")
/ stimulusframes = [1 = targetB, errorReminder]
/ posttrialpause = parameters.ISI
</trial>

<trial targetAleft>
/ validresponse = ("E", "I")
/ correctresponse = ("E")
/ stimulusframes = [1 = targetA, errorReminder]
/ posttrialpause = parameters.ISI
</trial>

<trial targetAright>
/ validresponse = ("E", "I")
/ correctresponse = ("I")
/ stimulusframes = [1 = targetA, errorReminder]
/ posttrialpause = parameters.ISI
</trial>

**************************************************************************************************************
**************************************************************************************************************
BLOCKS
**************************************************************************************************************
**************************************************************************************************************

<block attributepractice>
/ bgstim = (attributeAleft, attributeBright)
/ trials = [
1=instructions;
2-21 = random(attributeA, attributeB);
]
/ errormessage = true(error,200)
/ responsemode = correct
</block>

<block targetcompatiblepractice>
/ bgstim = (targetAleft, targetBright)
/ trials = [
1=instructions;
2-21 = random(targetAleft, targetBright);
]
/ errormessage = true(error,200)
/ responsemode = correct
</block>

<block targetincompatiblepractice>
/ bgstim = (targetAright, targetBleft)
/ trials = [
1=instructions;
2-21 = random(targetAright, targetBleft);
]
/ errormessage = true(error,200)
/ responsemode = correct
</block>

<block targetcompatiblepracticeswitch>
/ bgstim = (targetAleft, targetBright)
/ trials = [
1=instructions;
2-41 = random(targetAleft, targetBright);
]
/ errormessage = true(error,200)
/ responsemode = correct
</block>

<block targetincompatiblepracticeswitch>
/ bgstim = (targetAright, targetBleft)
/ trials = [
1=instructions;
2-41 = random(targetAright, targetBleft);
]
/ errormessage = true(error,200)
/ responsemode = correct
</block>

<block compatibletest1>
/ bgstim = (targetAleftmixed, orleft, attributeAleft, targetBrightmixed, orright, attributeBright)
/ trials = [1=instructions;
3,5,7,9,11,13,15,17,19,21= random(targetAleft, targetBright);
2,4,6,8,10,12,14,16,18,20 = random(attributeA, attributeB)]
/ errormessage = true(error,200)
/ responsemode = correct
/ ontrialend = [
if(block.compatibletest1.latency <= 10000 && block.compatibletest1.currenttrialnumber != 1 ) values.sum1a = values.sum1a + block.compatibletest1.latency;
if(block.compatibletest1.latency <= 10000 && block.compatibletest1.currenttrialnumber != 1 ) values.n1a += 1;
if(block.compatibletest1.latency <= 10000 && block.compatibletest1.currenttrialnumber != 1 ) values.ss1a = values.ss1a + (block.compatibletest1.latency * block.compatibletest1.latency);
if(block.compatibletest1.latency <= 10000 && block.compatibletest1.currenttrialnumber != 1 ) values.n_correct += block.compatibletest1.correct;
]
</block>

<block compatibletest2>
/ bgstim = (targetAleftmixed, orleft, attributeAleft, targetBrightmixed, orright, attributeBright)
/ trials = [
2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40 = random(targetAleft, targetBright);
1,3,5,7,9,11,13,15,17,19,21,23,25,27,29,31,33,35,37,39 = random(attributeA, attributeB)]
/ errormessage = true(error,200)
/ responsemode = correct
/ ontrialend = [
if(block.compatibletest2.latency <= 10000) values.sum1b = values.sum1b + block.compatibletest2.latency;
if(block.compatibletest2.latency <= 10000) values.n1b += 1;
if(block.compatibletest2.latency <= 10000) values.ss1b = values.ss1b + (block.compatibletest2.latency * block.compatibletest2.latency);
if(block.compatibletest2.latency <= 10000) values.n_correct += block.compatibletest2.correct;
]
</block>

<block incompatibletest1>
/ bgstim = (targetBleftmixed, orleft, attributeAleft, targetArightmixed, orright, attributeBright)
/ trials = [1=instructions;
3,5,7,9,11,13,15,17,19,21 = random(targetBleft, targetAright);
2,4,6,8,10,12,14,16,18,20 = random(attributeA, attributeB)]
/ errormessage = true(error,200)
/ responsemode = correct
/ ontrialend = [
if(block.incompatibletest1.latency <= 10000 && block.incompatibletest1.currenttrialnumber != 1) values.sum2a = values.sum2a + block.incompatibletest1.latency;
if(block.incompatibletest1.latency <= 10000 && block.incompatibletest1.currenttrialnumber != 1 ) values.n2a += 1;
if(block.incompatibletest1.latency <= 10000 && block.incompatibletest1.currenttrialnumber != 1 ) values.ss2a = values.ss2a + (block.incompatibletest1.latency * block.incompatibletest1.latency);
if(block.incompatibletest1.latency <= 10000 && block.incompatibletest1.currenttrialnumber != 1 ) values.n_correct += block.incompatibletest1.correct;
]
</block>

<block incompatibletest2>
/ bgstim = (targetBleftmixed, orleft, attributeAleft, targetArightmixed, orright, attributeBright)
/ trials = [
2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40 = random(targetBleft, targetAright);
1,3,5,7,9,11,13,15,17,19,21,23,25,27,29,31,33,35,37,39 = random(attributeA, attributeB)]
/ errormessage = true(error,200)
/ responsemode = correct
/ ontrialend = [
if(block.incompatibletest2.latency <= 10000) values.sum2b = values.sum2b + block.incompatibletest2.latency;
if(block.incompatibletest2.latency <= 10000) values.n2b += 1;
if(block.incompatibletest2.latency <= 10000) values.ss2b = values.ss2b + (block.incompatibletest2.latency * block.incompatibletest2.latency);
if(block.incompatibletest2.latency <= 10000) values.n_correct += block.incompatibletest2.correct;
]
</block>

<block compatibletestinstructions>
/ bgstim = (targetAleftmixed, orleft, attributeAleft, targetBrightmixed, orright, attributeBright)
/ trials = [1=instructions]
/ recorddata = false
</block>

<block incompatibletestinstructions>
/ bgstim = (targetBleftmixed, orleft, attributeAleft, targetArightmixed, orright, attributeBright)
/ trials = [1=instructions]
/ recorddata = false
</block>

<block summary>
/skip = [parameters.showsummaryfeedback == false]
/ trials = [1=summary]
/ recorddata = false
</block>

**************************************************************************************************************
**************************************************************************************************************
EXPERIMENT
**************************************************************************************************************
**************************************************************************************************************
Groupassignment is done by groupnumber

<expt>
/ preinstructions = (iatintro)
/subjects = (1 of 2)
/groupassignment = groupnumber
/ blocks = [
1=targetcompatiblepractice;
2=attributepractice;
3=compatibletest1;
4=compatibletestinstructions;
5=compatibletest2;
6=targetincompatiblepractice;
7=incompatibletest1;
8=incompatibletestinstructions;
9=incompatibletest2;
10=summary;
]
/onexptend = [values.completed = 1]
</expt>

<expt>
/ preinstructions = (iatintro)
/subjects = (2 of 2)
/groupassignment = groupnumber
/ blocks = [
1=targetincompatiblepractice;
2=attributepractice;
3=incompatibletest1;
4=incompatibletestinstructions;
5=incompatibletest2;
6=targetcompatiblepractice;
7=compatibletest1;
8=compatibletestinstructions;
9=compatibletest2;
10=summary;
]
/onexptend = [values.completed = 1]
</expt>

***********************************************************************
Test Monkey
***********************************************************************
<monkey>
/ latencydistribution = normal(500, 100)
/ percentcorrect = 90
</monkey>
**************************************************************************************************************
End of File


If you wish to run the first condition only, then the easiest way is to simply eliminate the 2nd <expt> element entirely; the <expt> elements are where condition assignment happens. The first <expt> runs the the compatible condition, first  so you'll want to keep that, the 2nd <expt> runs the incompatible condition first, that one you'll want to delete.

I.e. in your script change

<expt>
/ preinstructions = (iatintro)
/subjects = (1 of 2)
/groupassignment = groupnumber
/ blocks = [
1=targetcompatiblepractice;
2=attributepractice;
3=compatibletest1;
4=compatibletestinstructions;
5=compatibletest2;
6=targetincompatiblepractice;
7=incompatibletest1;
8=incompatibletestinstructions;
9=incompatibletest2;
10=summary;
]
/onexptend = [values.completed = 1]
</expt>

<expt>
/ preinstructions = (iatintro)
/subjects = (2 of 2)
/groupassignment = groupnumber
/ blocks = [
1=targetincompatiblepractice;
2=attributepractice;
3=incompatibletest1;
4=incompatibletestinstructions;
5=incompatibletest2;
6=targetcompatiblepractice;
7=compatibletest1;
8=compatibletestinstructions;
9=compatibletest2;
10=summary;
]
/onexptend = [values.completed = 1]
</expt>

to

<expt>
/ preinstructions = (iatintro)
/subjects = (1 of 1)
/groupassignment = groupnumber
/ blocks = [
1=targetcompatiblepractice;
2=attributepractice;
3=compatibletest1;
4=compatibletestinstructions;
5=compatibletest2;
6=targetincompatiblepractice;
7=incompatibletest1;
8=incompatibletestinstructions;
9=incompatibletest2;
10=summary;
]
/onexptend = [values.completed = 1]
</expt>

only.

Thanks a million.....again Dave! Ben
GO


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