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									EVENT-BASED PROSPECTIVE MEMORY TASK
SCRIPT INFO

Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com) for Millisecond Software, LLC
Date: 10-01-2015
last updated: 03-21-2016 by K.Borchert (katjab@millisecond.com) for Millisecond Software LLC

Copyright © 03-21-2016 Millisecond Software


BACKGROUND INFO

											*Purpose*
This script implements a computerized Event-based Prospective Memory Task similarly to the non-computerized one described in:

Cheng, H., Yang, Z., Dong, B., Chen, C., Zhang, M., Huang, Z., Chen, Z & Kai Wang, K. (2013).
Chemotherapy-induced prospective memory impairment in patients with breast cancer.
Psycho-Oncology 22, 2391–2395 (2013)
Published online 15 May 2013 in Wiley Online Library (wileyonlinelibrary.com). DOI: 10.1002/pon.3291.


											  *Task*
Participants are told that they participate in a visual search experiment. They are presented 'cards'
with 12 items randomly presented in a 4x3 matrix; 10 of these items belong to one category and 2 to another ('outsiders').
Participant are asked to select the 2 outsiders by mouse click.
Before the start of the task participants are also asked to do an exta click with their mouse 
whenever the 2 outsiders are two particular target words (here: "giraffe" and "rabbit") => Prospective Memory Task1*.
Additionally they are asked to let the experimenters know whether they are right-handed or left-handed.
For this purpose, a general comment box is provided at the end of the task. => Prospective Memory Task2.*

*Note: in Cheng et al (2013)
Prospective Memory Task 1: tap the desk whenever the 2 target words appear
Prospective Memory Task 2: at the end of the experiment, tell your experimenter your phone number


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

(1) Raw data file: 'ProspectiveMemoryTask_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 
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) 
/outsider1-
/outsider2:						store the 2 randomly assigned outsider (minority) words
response:						the participant's response (scancode of response button pressed)
correct:						the correctness of the response (1 = correct; 0 = incorrect)
								=> foil trials: pressing 57 is correct response; target trials: pressing 20 is correct response
/values.correct:				0 = did not select any correct outsider; 1 = selected one correct outsider; 2 = selected both correct outsiders
latency: 						the response latency (in ms)
/Hit:							stores the number of hits (=pressing T instead of Spacebar for a target trial)
/Miss:							stores the number of misses (=pressing Spacebar instead of T for a target trial)
/handednessresponse:			stores the reported handedness (-> Prospective Memory Task II)
									Note: the computer can only determine if the comment left for experimenter contains the word 'left' or 'right'
									=> the responses should be manually checked to make sure, no response that indicates a recall of the handedness task was missed.
/finalpoints:					number of final target points earned

(2) Summary data file: 'ProspectiveMemoryTask_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)
/Hit:							stores the number of hits (=pressing T instead of Spacebar for a target trial)
/Miss:							stores the number of misses (=pressing Spacebar instead of T for a target trial)
/FA:							stores the number of false alarms (=pressing T instead of Spacebar for a foil trial)
/CR:							stores the number of correct rejections (=pressing Spacebar for a foil trial)
/handednessresponse:			stores the reported handedness (-> Prospective Memory Task II)
									Note: the computer can only determine if the comment left for experimenter contains the word 'left' or 'right'
									=> the responses should be manually checked to make sure that no response that indicates a recall of the handedness task was missed.
/finalpoints:					number of final target points earned



EXPERIMENTAL SET-UP

* 1 Test Block of 30 trials (6 main categories x 5 outsider categories)
* Target Trials: 5th, 10th, 15th, 20th, 25th, 30th (target trials randomly selected from the 6 possible combinations)
* The remaining 24 trials are randomly selected 
* Participants have as much time as needed to find the outliers

Scoring: for each successful T-press, participants earned a point. No penalties are given for False Alarms
(but False Alarms are recorded for subsequent data analyses).
Participants earn an additional 2 points for remembering to press L or R at the end of the task.
Max: 8 points

STIMULI
Stimuli are not original to Cheng et al (2013).
In this script, there are 6 categories of main stimuli and 5 categories of outsider stimuli (one of them the target stimuli).
Each majority category is presented with each outsider category once (=> 6 x 5 = 30 trials).
The 2 outsider stimuli of a foil category are randomly selected from a group of 6. 
The stimuli can easily be edited under section Editable Lists.

INSTRUCTIONS
The provided instructions are not original to Cheng et al (2013). They are provided by Millisecond Software and 
are easily editable under section Editable Instructions.

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.

/ITIduration:		the duration of the intertrial interval in ms. The intertrial interval is the trial that records
					Spacebar presses (default: 2000ms)


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