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								AFFECT MISATTRIBUTION PROCEDURE (AMP)

SCRIPT INFO

last updated: 01-30-2016 by K.Borchert (katjab@millisecond.com) for Millisecond Software LLC
Copyright © 01-30-2016 Millisecond Software


BACKGROUND INFO

											*Purpose*

This script implements the AMP as described in:
Payne, B.K., Cheng, C.M., OGovorun, O., and Stewart, B.D. (2005). An Inkblot for Attitudes: 
Affect Misattribution as Implicit Measurement. Journal of Personality and Social Psychology,
Vol. 89, No. 3, 277–293.

The script implements the AMP measuring implicit attitudes towards flowers and insects. 
The script is designed to be easily adaptable to other target categories.
Target categories can be edited under section "Editable Stimuli" below. 


											  *Task*
Participants see brief flashes of pictures of flowers and insects (and a neutral stimulus)
followed by Chinese characters and are asked to judge the pleasantness of each Chinese character 
as "pleasant" or "unpleasant" as fast as possible.


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

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

build:									Inquisit build
computer.platform:						the platform the script was run on
date, time, subject:					date and time script was run with the current subjectnumber 
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) 
targetstim:								stores the itemnumber of the current target stimulus
primestim:									stores the itemnumber of the current prime stimulus
response:								the response of participant (scancode of the response)
correct:								stores the correctness of the response (1 = correct; 0 = incorrect)
										correctness in this script: pressed the response key that corresponds to the prime 										
latency:								response latency (in ms); in this script: measured from onset of target

trial.primeA.totalpercentcorrect:		the percent correct for primeA (flowers) across all test blocks (here: 1 test block)
											correct = participant pressed the response key that corresponds to the prime (here: pressed pleasant for trials with flowers)
trial.primeB.totalpercentcorrect:		the percent correct for primeB (insects) across all test blocks (here: 1 test block)
											correct = participant pressed the response key that corresponds to the prime (here: pressed unpleasant for trials with insects)
trial.primeNeutral.totalpercentcorrect:	the percent correct for primeNeutral across all test blocks (here: 1 test block)
											correct = participant pressed the response key that corresponds to the prime (here: either response keys)


(2) Summary data file: 'AMP_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)
trial.primeA.totalpercentcorrect:		the percent correct for primeA (flowers) across all test blocks (here: 1 test block)
											correct = participant pressed the response key that corresponds to the prime (here: pressed pleasant for trials with flowers)
trial.primeB.totalpercentcorrect:		the percent correct for primeB (insects) across all test blocks (here: 1 test block)
											correct = participant pressed the response key that corresponds to the prime (here: pressed unpleasant for trials with insects)
trial.primeNeutral.totalpercentcorrect:	the percent correct for primeNeutral across all test blocks (here: 1 test block)
											correct = participant pressed the response key that corresponds to the prime (here: either response keys)

EXPERIMENTAL SET-UP
* 1 Practice block of 10 trials randomly selecting from flowers/insects/neutral
* 1 Test block of 48 trials randomly selecting from flowers/insects/neutral

	Trials:
	* prime is presented for 75ms
	* prime is replaced by a blank stimulus for 125ms
	* the target is presented for 100ms and then covered up by a mask 

STIMULI

INSTRUCTIONS

EDITABLE CODE:
check under EDITABLE CODE below for (relatively) easily editable 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.

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