Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com), Millisecond
Created: January 08, 2020
Last Modified: January 10, 2025 by K. Borchert (katjab@millisecond.com), Millisecond
Script Copyright © Millisecond Software, LLC
This script implements a simple Reaction Time Time Task, a subset of the Cognitive Drug Research Computerized Assessment System (COGDRAS).
THE EVALUATION OF EARLY DEMENTIA. INTERNATIONAL JOURNAL OF GERIATRIC PSYCHIATRY, VOL. 10: 199-206.
2 minutes
Participants are asked to press a certain response key (here: Q) whenever the word YES appears in the middle of the screen.
1. Test
- 20 trials (editable parameters)
Trial sequence:
- word YES appears (wait for response) -> random iti (1000-2500ms) -> word YES....
provided by Millisecond - can be edited under section Editable Stimuli
The word YES - size can be set under section Editable Parameters
provided by Millisecond - can be edited under section Editable Instructions
File Name: simplereactiontime_cogdras_summary*.iqdat
| Name | Description |
|---|---|
| inquisit.version | Inquisit version number |
| computer.platform | Device platform: win | mac |ios | android |
| startDate | Date the session was run |
| startTime | Time the session was run |
| subjectId | Participant ID |
| groupId | Group number |
| sessionId | Session number |
| elapsedTime | Session duration in ms |
| completed | 0 = Test was not completed 1 = Test was completed |
| srtRT | The mean response time (in ms) in the Simple Reaction Time test (measured from onset of word 'YES' in the center of the screen) |
File Name: simplereactiontime_cogdras_raw*.iqdat
| Name | Description |
|---|---|
| build | Inquisit version number |
| computer.platform | Device platform: win | mac |ios | android |
| date | Date the session was run |
| time | Time the session was run |
| subject | Participant ID |
| group | Group number |
| session | Session number |
| blockCode | Name of the current block |
| blockNum | Number of the current block |
| trialCode | Name of the current trial |
| trialNum | Number of the current trial |
| countTrials | Custom counter of test trials (those that present word "YES") |
| stimulusItem | The presented stimuli in order of trial presentation |
| response | The participant's response (scancode of response buttons) 16 = Q |
| responseLabel | "yes" |
| latency | The response latency (in ms); measured from: onset of word YES |
| iti | The intertrial interval (in ms) run at the end of the current trial |
The procedure can be adjusted by setting the following parameters.
| Name | Description | Default |
|---|---|---|
Stimsize |
||
| stimSize | The proportional sizing of the yes-word on screen | 20% |
Experimental Design Parameters |
||
| nrTestTrials | The number of test trials run | 20 |
Response Keys: Note Only The Yes-Key Is Used In This Script |
||
| leftKey | The left response key (here: Q) | "Q" |
| rightKey | The right response key (here: P) | "P" |
| yesKey | The assignment of left/right key to the yesKey (here Q); left keys will appear on the left on touch screens | parameters.leftKey |
| noKey | The assignment of left/right key to the noKey (here P); right keys will appear on the right on touch screens | parameters.rightKey |