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							Baddeley's 3-Minute Grammatical Reasoning Test


Script Author: Sean Draine, Ph.D. ( for Millisecond Software, LLC
last updated:  11-20-2018 by K. Borchert ( for Millisecond Software, LLC

Script Copyright ©  11-20-2018 Millisecond Software



This script implements the Baddeley's 3-Minute Grammatical Reasoning Test as first 
described in:

Baddeley, A. D. (1968). A 3 min reasoning test based on grammatical transformation. 
Psychonomic Science, 10, 341-342.

Participants view statements like "A follows B" paired with 2 letters "AB" or "BA" and are asked
to judge whether the letter pair is a correct representation of the statement by clicking
"true" or "false". The test times out after 3 minutes.

The default data stored in the data files are:

(1) Raw data file: 'Baddeley_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) 
stimulusitem:					the presented stimuli in order of trial presentation
response:						the participant's response (true or false)
correct:						the correctness of the response (1 = correct; 0 = incorrect)
latency: 						the response latency (in ms)
totalnumcorrect: 				total correct responses tallied separately for practice and test trials

(2) Summary data file: 'Baddeley_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.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)
block.test.totalnumcorrect:		total number of correct test responses

- 64 statements (half 'true') tested in 3 minutes
- order of statements random
- 4 practice statements

- 64 statements: 2 phrasing (positive vs negative) x 2 activeness (active vs passive) x 2 Correctness (true vs false) x 2 order (precedes vs. follows) x 2 first letter mentioned in statement (A or B) vs. 2 letter pairs (AB vs BA)


check under EDITABLE CODE 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.

/testduration:			sets the duration of the test in ms (default: 3min => 180000ms)

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