Last Modified: January 11, 2025 by K. Borchert (katjab@millisecond.com), Millisecond
Script Copyright © Millisecond Software, LLC
This script implements an example Stroop test with voice recognition. The classic Stroop paradigm demonstrates the interference of word meaning on the naming of the color in which the words are written as measured by reaction time/accuracy differences to color-meaning congruent and color-meaning incongruent combinations.
This script runs a color naming task and a word naming task. The order is counterbalanced by groupnumber.
This scripts collects spoken words as input. Millisecond recommends testing that voice recognition works. The script records voicerecords as backup that can be manually scored or with help of the following 'Tools -> Speech Recognition -> Analyze Recorded Responses'
Stroop, J, R. (1935). Studies of interference in serial verbal reactions. Journal of Experimental Psychology, 18, 643-662.
3 minutes
Participants are asked to do a Color Naming and a Word Naming Task. For both task, color words (e.g. red, blue) are presented in different colors. In some of the cases, the color word (e.g. red) and its color (e.g. red) are congruent; in other cases the color word (e.g. red) and its color (e.g. blue) are discongruent. For the Color Naming Task, participants have to say the color of the word as fast as possible. For the Word Naming Task, participants have to say the actual word as fast as possible disregarding their color.
This script runs a color naming task and a word naming task. The order is counterbalanced by groupnumber.
odd groupnumbers -> color naming task, word naming task
even groupnumbers -> word naming task, color naming task
Color Naming Task: 25 trials - 5 repetitions of the
each of the 5 color words (red, green, blue, black, yellow) is presented in each of the 5 colors once
(= 4 incongruent: 1 congruent trials)
Participants have to name the color of the word as fast as possible (disregarding the word's meaning)
Word Naming Task: 25 trials - 5 repetitions of the
each of the 5 color words (red, green, blue, black, yellow) is presented in each of the 5 colors once.
Participants have to say the word as fast as possible (disregarding its color)
The five color words: red, green, blue, black, yellow
size: 6% of canvas height
font: Arial
Instructions provided by Millisecond - see section Editable Instructions
File Name: strooptask_withvoicerecognition_summary*.iqdat
| Name | Description |
|---|---|
| inquisit.version | Inquisit version number |
| computer.platform | Device platform: win | mac |ios | android |
| computer.touch | 0 = device has no touchscreen capabilities; 1 = device has touchscreen capabilities |
| computer.hasKeyboard | 0 = no external keyboard detected; 1 = external keyboard detected |
| 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 |
| meanCorrRTCongruentColor | Mean latency (in ms) for correct congruent stimuli in the color block |
| meanCorrRTIncongruentColor | Mean latency (in ms) for correct incongruent stimuli in the color block |
| errorRateCongruentColor | Errorate for congruent stimuli in the color block |
| errorRateIncongruentColor | Errorate for congruent stimuli in the color block |
| meanCorrRTCongruentWord | Mean latency (in ms) for correct congruent stimuli the word naming block |
| meanCorrRTIncongruentWord | Mean latency (in ms) for correct incongruent stimuli the word naming block |
| errorRateCongruentWord | Errorate for congruent stimuli in the word naming block |
| errorRateIncongruentWord | Errorate for congruent stimuli in the word naming block |
File Name: strooptask_withvoicerecognition_raw*.iqdat
| Name | Description |
|---|---|
| build | Inquisit version number |
| computer.platform | Device platform: win | mac |ios | android |
| computer.touch | 0 = device has no touchscreen capabilities; 1 = device has touchscreen capabilities |
| computer.hasKeyboard | 0 = no external keyboard detected; 1 = external keyboard detected |
| date | Date the session was run |
| time | Time the session was run |
| subject | Participant ID |
| group | Group number |
| session | Session number |
| blockcode | The name the current block (built-in Inquisit variable) |
| blocknum | The number of the current block (built-in Inquisit variable) |
| trialcode | The name of the currently recorded trial (built-in Inquisit variable) |
| trialnum | The number of the currently recorded trial (built-in Inquisit variable) trialnum is a built-in Inquisit variable; it counts all trials run even those that do not store data to the data file. |
| color | Contains current color of the word |
| congruence | 1= congruent; 2 = incongruent |
| stimulusItem | The presented stimuli in order of trial presentation |
| response | The participant's response (spoken word - as recognized by voice recognition software) |
| correct | Accuracy of response: 1 = correct response; 0 = otherwise |
| latency | The response latency (in ms); measured from |