___________________________________________________________________________________________________________________ *Immediate Word Recognition* (subtest of COGDRAS) ___________________________________________________________________________________________________________________ Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com) for Millisecond Software, LLC Date: 09-01-2020 last updated: 04-11-2023 by K. Borchert (katjab@millisecond.com) for Millisecond Software, LLC Script Copyright © 04-11-2023 Millisecond Software ___________________________________________________________________________________________________________________ BACKGROUND INFO ___________________________________________________________________________________________________________________ This script implements a procedure to test Immediate Word Recognition. Immediate Word Recognition is a subset of the Cognitive Drug Research Computerized Assessment System (COGDRAS). Reference Nicholl, C.G. et al (1995). THE COGNITIVE DRUG RESEARCH COMPUTERIZED ASSESSMENT SYSTEM IN SPEED OF THE ESSENCE? THE EVALUATION OF EARLY DEMENTIA. INTERNATIONAL JOURNAL OF GERIATRIC PSYCHIATRY, VOL. 10: 199-206. ___________________________________________________________________________________________________________________ TASK DESCRIPTION ___________________________________________________________________________________________________________________ Participants view a list of 12 words, each presented for 3seconds. Afterwards they are given 24 words (12 old, 12 new) and are asked to press a dedicated YES-key for words previously seen and press a dedicated NO-key for new words. ___________________________________________________________________________________________________________________ DURATION ___________________________________________________________________________________________________________________ the default set-up of the script takes appr. 3 minutes to complete Note: the test can easily be aborted by pressing "Ctrl+Alt+A" ___________________________________________________________________________________________________________________ DATA OUTPUT DICTIONAIRY ___________________________________________________________________________________________________________________ The fields in the data files are: (1) Raw data file: 'immediatewordrecognition_cogdras_raw*.iqdat' (a separate file for each participant)* build: The specific Inquisit version used (the 'build') that was run computer.platform: the platform the script was run on (win/mac/ios/android) date, time: date and time script was run subject, group: with the current subject/groupnumber session: with the current session id blockCode, blockNum: the name and number of the current block (built-in Inquisit variable) trialCode, trialNum: the name and number of the currently recorded trial (built-in Inquisit variable) Note: trialNum is a built-in Inquisit variable; it counts all trials run; even those that do not store data to the data file. stimulusitem: the presented words response: the participant's response (scancode of response buttons) 16 = Q 25 = P 57 = spacebar responseLabel: "yes" vs. "no" responseCategory: "Hit" (pressed yes-key for a target word) "Miss" (pressed no-key for a target word) = omission error "CR" (pressed no-key for a foil word) = correct rejection "FA" (pressed yes-key for a foil word) = commission error correct: accuracy of response: 1 = correct response; 0 = otherwise latency: the response latency (in ms); measured from: onset of words (2) Summary data file: 'immediatewordrecognition_cogdras_summary*.iqdat' (a separate file for each participant)* inquisit.version: the Inquisit build/version run computer.platform: the platform the script was run on (win/mac/ios/android) startDate: date script was run startTime: time script was started subjectId: assigned subject id number groupId: assigned group id number sessionId: assigned session id number elapsedTime: time it took to run script (in ms); measured from onset to offset of script completed: 0 = script was not completed (prematurely aborted); 1 = script was completed (all conditions run) IREC_ACC: proportion correct recognition (across target and foil words) in Immediate Word Recognition Test IREC_RT: mean response time (in ms) of correct responses (across target and foil words) during recognition phase in Immediate Word Recognition Test IREC_hitRT: mean response time (in ms) of correct responses for target words only rHIT: the hitrate (proportion correct responses for target words => participant said 'yes' to target words) rFA: the false alarm rate (proportion of incorrect responses for foil words => participants said 'yes' to foil words) IREC_Aprime: non-parametric measure of sensitivity in Immediate Word Recognition Test Range: 0 (all incorrect responses) - 0.5 (random responses) - 1 (all correct responses) For Aprime measure see: Stanislaw, H. & Todorov, N. (1999). Calculation of signal detection theory measures. Behavior Research Methods, Instruments, & Computers, 1999, 31 (1), 137-149. Note: Nicholl et al (1995) used the non-parametric signal theory index (SI) presented by Frey and Colliver (1973) with a range of -1 (all incorrect) to 1 (all correct) * separate data files: to change to one data file for all participants (on Inquisit Lab only), go to section "DATA" and follow further instructions ___________________________________________________________________________________________________________________ EXPERIMENTAL SET-UP ___________________________________________________________________________________________________________________ (1) Learning: - 12 words are presented one-by-one in the middle of the screen; each is presented for 3s (editable parameter) (2) Recognition Test - 12 target words (from learning) and 12 foil (=new)) words are presented, one-by-one in the middle of the screen; order is randomly determined - participant respond by pressing 'Q' for yes (it's a target) or 'P' for no (it's a foil/not a target) ___________________________________________________________________________________________________________________ STIMULI ___________________________________________________________________________________________________________________ provided by Millisecond Software - can be edited under section Editable Stimuli The current words provided in this script were taken from: McEvoy, C. L., & Nelson, D. L. (1982). Category name and instance norms for 106 categories of various sizes. American Journal of Psychology, 95, 581-634. Nairne, J. S. (1990). A feature model of immediate memory. Memory and Cognition, 18, 251-269. Each of the 24 words come from a different category. The words can easily be exchanged for others. ___________________________________________________________________________________________________________________ INSTRUCTIONS ___________________________________________________________________________________________________________________ provided by Millisecond Software - can be edited 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.