Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com), Millisecond
Created: January 10, 2014
Last Modified: January 17, 2023 by K. Borchert (katjab@millisecond.com), Millisecond
Script Copyright © Millisecond Software, LLC
This script runs a Gender Auditory Stroop Procedure. The classic Stroop paradigm, using visual stimuli, demonstrates the interference of word meaning on naming the color in which the words are written as measured by reaction time/accuracy differences to color-meaning congruent and color-meaning incongruent combinations. The Gender Auditory Stroop Procedure tests the interference effect using auditory congruent and incongruent stimuli combinations.
The implemented procedure is based on:
Green, E.J. & Barber, P.J. (1981). An auditory Stroop effect with judgments of speaker gender. Perception &Psychophysics, 30, 459-466.
8 minutes
Participants hear words spoken in a female or male voice and have to sort them according to speaker gender. Some words are stroop words ("man" vs. "girl") -words that have a relation to gender- some are control words ("mill" vs. "game") - words that have no relation to gender.
Control and stroop words are tested either in a mixed or in a blocked design depending on selected groupnumber:
Groupnumber1: runs mixed design with female on the left response key and male category on the right response key Groupnumber2: runs blocked design with female on the left response key and male category on the right response key Groupnumber3: runs mixed design with female on the right response key and male category on the left response key Groupnumber4: runs blocked design with female on the right response key and male category on the left response key
within-participant: Stroop (gender-related) vs. Control (gender non-related) words
between-participant: mixed vs blocked presentation of stroop and control words (selected by groupnumber: odd -> mixed; even -> blocked)
blocked: block.Controlwords; block.StroopWords => each run the 4 stimuli x 6 repetitions (for a total of 2 x 24 = 48 trials)
the order of the blocks is randomly determined
mixed: block.GenderStroop (run twice) => each run 8 stimuli x 3 repetitions (for a total of 2 x 24 = 48 trials)
Responsekeyassignments are counterbalanced by groupnumber (more info under section EXPERIMENT):
Groupnumber1: runs mixed design with female on the left response key and male category on the right response key
Groupnumber2: runs blocked design with female on the left response key and male category on the right response key
Groupnumber3: runs mixed design with female on the right response key and male category on the left response key
Groupnumber4: runs blocked design with female on the right response key and male category on the left response key
Practice:
- Blocked: each test block is preceded by an 8-trial practice session (each word is presented twice)
- Mixed: one practice block of 16 trials before the test blocks
Trials:
each trial lasts 5s (soa = 5s btw onset of consecutive stimuli);
speed can be adjusted under Editable Parameters
Stroop Words: Man, Girl
Control Words: Mill, Game
Recordings are provided by Millisecond and were done by a single male and a
single female voice in Audacity (native speakers of American English)
The sound files can be exchanged under section Editable Stimuli
Instructions are not original. They are provided by Millisecond and can be
edited under section Editable Instructions.
File Name: auditorystroop_Gender_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 |
| presentation | "mixed" vs. "blocked" the distinction btw. congruent and incongruent control trials is arbitrary as the words spoken have no female-male affiliation |
| list.accCStroop.itemCount | Counts congruent Stroop trials |
| list.accIcStroop.itemCount | Counts incongruent Stroop trials |
| list.accCCtrl.itemCount | Counts congruent Control trials |
| list.accIcCtrl.itemCount | Counts incongruent Control trials |
| propCorrectCongruentstroop | Proportion correct congruent Stroop trials |
| propCorrectIncongruentstroop | Proportion correct incongruent Stroop trials |
| propCorrectCongruentControl | Proportion correct congruent Control trials |
| propCorrectIncongruentControl | Proportion correct incongruent Control trials |
| meanrtCongruentstroop | Mean latency (in ms) for correct congruent Stroop trials |
| meanrtIncongruentstroop | Mean latency (in ms) for correct incongruent Stroop trials |
| meanrtCongruentControl | Mean latency (in ms) for correct congruent Control trials |
| meanrtIncongruentControl | Mean latency (in ms) for correct incongruent Control trials |
File Name: auditorystroop_Gender_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 |
| presentation | "mixed" vs. "blocked" |
| condition | "Stroop" vs. "Control" |
| gender | "male" vs. "female" recording voice |
| congruency | "congruent" vs. "incongurent" (for control words this distinction is pseudo-congruency) |
| stimulusItem | The presented stimuli in order of trial presentation |
| response | The participant's response (scancode of response button) 30 = left 38 = right 0 = no response |
| responseCategory | The interpreted key response "female" "male" "no response" |
| correct | The correctness of the response (1 = correct; 0 = incorrect) |
| latency | The response latency (in ms); measured from onset of spoken word |
The procedure can be adjusted by setting the following parameters.
| Name | Description | Default |
|---|---|---|
| responseKeyLeft | The left response key ("A") | |
| responseKeyRight | The right response key ("L") | |
| soa | Stimulus onset asynchrony: time between onset of one stimulus and the onset of the next in ms (default: 5000) -> every 5 s a new word is spoken. | |
| getReadyDuration | The duration (in ms) of the get-ready-trial | 5000ms |