___________________________________________________________________________________________________________________ *AUDITORY STROOP FOR ACOUSTIC DIMENSIONS (Pitch, Loudness, Duration)* ___________________________________________________________________________________________________________________ Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com) for Millisecond Software, LLC Date: 10-23-2014 last updated: 10-08-2024 by K. Borchert (katjab@millisecond.com) for Millisecond Software, LLC Script Copyright © 10-08-2024 Millisecond Software ___________________________________________________________________________________________________________________ BACKGROUND INFO ___________________________________________________________________________________________________________________ This script runs an 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. This Auditory Stroop Procedure tests the interference effect using auditory congruent and incongruent stimuli combinations in three sound dimensions: pitch, loudness, duration. Morgan, A.A.R. & Brandt, J.F. (1989). An Auditory Stroop Effect for Pitch, Loudness, and Time. BRAIN AND LANGUAGE 36, 592-603. ___________________________________________________________________________________________________________________ TASK DESCRIPTION ___________________________________________________________________________________________________________________ Participants hear Stroop and Non-Stroop words of 3 different acoustic dimensions (pitch, loudness, duration). Stroop Words: words that are related to the acoustic dimension (e.g. pitch: low) Non-Stroop Words: words that are neutral in relation to the acoustic dimensions (e.g. cat) Depending on the acoustic dimension tested, they have to make categorical judgments and sort the word into one of 2 categories as fast as possible. Example: they hear 'cat' in a low-pitched voice and are asked to either press the response key dedicated to 'low' or press the response key dedicated to 'high'. ___________________________________________________________________________________________________________________ DURATION ___________________________________________________________________________________________________________________ the default set-up of the script takes appr. 30-40 minutes to complete ___________________________________________________________________________________________________________________ DATA OUTPUT DICTIONARY ___________________________________________________________________________________________________________________ The fields in the data files are: (1) Raw data file: 'auditorystroop_acousticdimensions_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 such as feedback trials. Thus, trialNum may not reflect the number of main trials run per block. (parameter) earCondition: 1 = right ear is tested; 2 = left ear is tested 3 = dual channels dimension: 1 = pitch; 2 = loudness; 3 = duration; 4 = control_pitch; 5 = control_loudness; 6 = control_duration level: 1 = high/loud/long; 2 = low/SOFT/short; 3 = neutral congruence: 0 = neutral/control; 1 = congruent; 2 = incongruent volume: stores the current word volume selectedItemNumber: stores the actual itemnumber of the current stimulus (e.g. item 5 of level HIGH -> itemnumber: 11 of item.pitchwords) practiceInstruct: either Right (1) or Left (2) ear instructions for practice trials for a practice trial stimulusItem: the presented stimuli in order of trial presentation response: the participant's response (scancode of response key) 30 = A 38 = L responseCategory: the interpreted key response: "high" vs. "low", "loud" vs. "SOFT", "long" vs. "short" correct: the correctness of the response (1 = correct; 0 = incorrect) Note: by design accuracy of response of "neutral stimuli" (level3 stimuli) is always set to 1 in this script latency: the response latency (in ms); measured from onset of word block.practice.meanLatency: stores the calculated mean response latency of the current practice block trial-by-trial block.practice.sdLatency: stores the calculated standard deviation of the response latencies of the current practice block trial-by-trial practiceCounter: tracks the number of practice blocks run (MAX = parameters.maxPracticeBlocks) practicePass: 0 = practice pass condition has not been reached (yet) 1 = practice pass condition has been reached (2) Summary data file: 'auditorystroop_acousticdimensions_summary*.iqdat' (a separate file for each participant) inquisit.version: Inquisit 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) (parameter) Earcondition: 1 = right ear is tested; 2 = left ear is tested 3 = dual channels practiceCounter: tracks the number of practice blocks run (MAX = parameters.maxPracticeBlocks) practicePass: 0 = practice pass condition has not been reached (yet) 1 = practice pass condition has been reached propcorrCP: proportion correct congruent pitch trials propcorrICP: proportion correct incongruent pitch trials meanRTCP: mean RT (in ms) of correct congruent pitch trials meanRTICP: mean RT (in ms) of correct incongruent pitch trials meanRTNP: mean RT (in ms) of neutral pitch trials (same for loudness 'L' and duration 'D' ) propcorrCompCtrlP: proportion correct comparison control pitch trials (comparison to congruent and incongruent trials) meanrtCompCtrlP: mean RT (in ms) of correct comparison control pitch trials !NOTE: comparison control trials = level 1 and level 2 (excluding the neutral stimuli) meanrtNCtrlP: mean RT (in ms) of neutral (level3) control pitch trials (same for control loudness 'ctrlL' and control duration 'ctrlD' ) ___________________________________________________________________________________________________________________ EXPERIMENTAL SET-UP ___________________________________________________________________________________________________________________ 6 acoustic dimensions (pitch/pitchcontrol, loudness/loudnesscontrol, duration/durationcontrol): tested within-subject, mixed design !!!NOTE: if the acoustic dimensions (pitch/loudness/duration) should be tested in a blocked-design, go to section EXPERIMENT and follow instructions 3 levels per acoustic dimension (e.g. pitch: low, high, neutral): tested within-subject, mixed design 6 stimuli per acoustic dimension 3 repetitions per stimuli Stimulus Onset Asynchrony: 5s => soundfiles are presented 5s apart (Editable Parameters) => 6 acoustic dimensions x 3 levels x 6 stimuli x 3 repetitions = 2 x 324 trials Note: Ear condition: parameters.Earcondition (Editable Parameters) sets whether the stimuli are presented through one ear (left or right) as done by Morgan & Brandt (1989) or both ears at the same time. By default, this script runs the dual channels conditions. Response key assignments to left or right: by default the left and right response keys are the 'A' and 'L' keys (change under Editable Parameters) Assignment of low-high, soft-loud, short-long response keys to the left and right response key (2 possible orders) is counterbalanced by odd vs. even groupnumber (See section EXPERIMENT for more info) Blocks: Training (1) Stabilization: participants are asked to respond randomly with the left and right response keys to various beeps (20 trials, editable parameter) (2) Familiarization: participants are presented all experimental stimuli but no response is required. The presentation stream can be paused in this script and the last stimuli repeated. !!!Note: parameters.run_Stabilization/parameters.run_Familiarization (Editable values) control if these blocks are run. If parameters.session_nr > 1, these values are automatically set to false (and these training blocks are skipped) (3) Practice: participants are asked to respond to a block of 12 randomly selected experimental stimuli by pushing the response button that corresponds to the instructions (e.g. LEFT/RIGHT) on the screen. LEFT/RIGHT instructions are randomly selected without replacement. Participants have to hit a certain criterium to move from practice otherwise another block of 12 trials is started. Criterium to quit practice: If the standard deviation of the response latencies of those 12 trials < 50% of the mean latency of those 12 trials (Morgan & Brandt, 1989, p.597) Practice is stopped after max 3 runs (see setting of parameters.maxPracticeBlocks) and the test is started. it is noted in the datafiles whether participants have reached the practice stop criterium. Experimental Block: (4) 324 trials: runs all 54 possible trials of each acoustic dimension (6 acoustic dimensions) (54 => 3 levels x 6 stimuli per level x 3 repetitions per stimuli) !Note: the semi-random order of the 324 trials is generated before each session by included helper script 'stimordergeneration.iqjs' with the following constraints: the same dimension (pitch, loudness, duration, control) cannot be run consecutively (this includes not running a pitched control word after a pitched stroop word etc.) ___________________________________________________________________________________________________________________ STIMULI ___________________________________________________________________________________________________________________ The provided sound files are not original to Morgan & Brandt (1989). They are provided by Millisecond Software. All recordings by a male native speaker of American English. Pitch & Duration were manipulated in Audacity. Volume is manipulated by script itself (neutral volume is set to be at -1000 for all conditions; loud is set to be at 0; and soft is set to be at -2000 - editable values) Stimuli can be exchanged under section Editable Stimuli ___________________________________________________________________________________________________________________ INSTRUCTIONS ___________________________________________________________________________________________________________________ The provided instructions are not original to Morgan & Brandt (1989). They are provided by Millisecond Software. The instructions are presented in the form of html pages. To change the instructions, edit the corresponding html files. To edit htm/html-files: open the respective documents in simple Text Editors such as TextEdit (Mac) or Notepad (Windows). ___________________________________________________________________________________________________________________ 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. The parameters you can change are: //design parameters / earCondition = 3 //1 = right ear is tested; 2 = left ear is tested; 3 = dual channels (default) / runStabilization = true //true: runs the stabilization procedure //false: does not run the stabilization procedure => might have to update default instructions / stabilizationTrials = 20 //number of stabilization trials to run (default: 20) => Max number that can be run is 108 / runFamiliarization = true //true: runs the familiarization procedure //false: does not run the familiarization procedure => might have to update default instructions //Note: if parameters.session_nr = 2; parameters.run_Stabilization and parameters.run_Familiarization are set to fault automatically / maxPracticeBlocks = 3 //max number of practice blocks before test is started //duration parameters / familiarizationDuration = 2000 //duration (in ms) of the stimuli presentations during familiarization trials (default: 2000ms) / soa = 5000 //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. ////Volume Adjustment: / loudVolume = 0 //volume setting for the loud volume (default: 0) Note: a setting of 0 plays the sound file at the recorded volume (0 is the max setting) / neutralVolume = -1000 //volume setting for all neutral sound files (default: -1000) Note: a slight volume reduction / softVolume = -2000 //volume setting for all soft sound files (default: -2000) //Responsekeys: / responseKeyLeft = "A" / responseKeyRight = "L" ___________________________________________________________________________________________________________________ *HELPER SCRIPT FOR AUDITORY STROOP (Pitch, Loudness, Duration)* ___________________________________________________________________________________________________________________ Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com) for Millisecond Software, LLC Date: 10-23-2014 last updated: 10-17-2023 by K. Borchert (katjab@millisecond.com) for Millisecond Software, LLC Script Copyright © 10-17-2023 Millisecond Software ___________________________________________________________________________________________________________________ BACKGROUND INFO ___________________________________________________________________________________________________________________ This script runs the stimulus order generation procedure for the AuditoryStroop_Pitch.iqjs *SCRIPT SPECIFICS* Constraints for Stimulus Order: - the same dimension (pitch, loudness, duration, control) cannot be run consecutively (this includes not running a pitched control word after a pitched stroop word etc.)