Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com), Millisecond
Created: January 04, 2013
Last Modified: January 20, 2023 by K. Borchert (katjab@millisecond.com), Millisecond
Script Copyright © Millisecond Software, LLC
This script implements the Temporal Reproduction procedure as described in:
Wittmann, M., Leland, D.S., Jan Churan, J. & Paulus, M.P.(2007). Impaired time perception and motor timing in stimulant-dependent subjects. Drug and Alcohol Dependence, 90, 183–192.
8 minutes
Participants are asked to estimate the duration of a target tone (tone 1, 1-5s) by manually interrupting (-> Spacebar) a comparison tone (tone 2) when they think tone 2 was played as long as tone 1. Participants are actively discouraged from counting seconds by introducting a distractor task. Before tone 1 is played two target symbols appear on the screen that participants are asked to remember for a later forced-choice recognition task. At the end of the entire trial sequence, a comparison symbol is presented and participants have to decide whether this symbol was one of the two target symbols.
a) Main Task: Temporal Reproduction
IV = duration of target tone (here: 1000ms, 2000ms, 3000ms, 4000, 5000ms) tested within-subjects
Main DV: latency of estimation (how long it takes participants to press
•Each level of the IV is repeated 6 times for a total of 30 trials.
•the order is determined randomly
•target tone 1 (300Hz)/comparison tone 2 (600Hz) have a maximum duration of 20,000ms/25,000ms in this script
(replace under section Editable Stimuli for longer durations; the tones for this script were created with
Audacity)
b) Distractor Task: forced-choice Recognition Task
the original article does not specify the details of this task
In this script: 10 symbols (customize under section Editable Stimuli)
• each symbol appears 6 times as one of the target symbols
• in half the time the comparison symbol is familiar
(it's randomly decided which one of the two symbols is chosen for familiar trials)
provided by Millisecond - can be edited under section Editable Stimuli
Instructions provided with this script are not the originals. Customize under section Editable Instructions
File Name: temporalReproduction_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 |
| distractorTaskErrorRate | Recognition error proportion for distractorTask |
| meanEstimationT1 - | Mean estimation time (in ms) for t1 to t5 meanEstimationT5 |
| stdEstimationT1- | Standard deviation of the estimation times for t1 to t5 stdEstimationT5 |
| cvT1- | Coefficient of variation for t1 to t5 cvT5 |
File Name: remporalReproduction_raw*.iqdat
| Name | Description |
|---|---|
| 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 |
| firstDistractor | Stores the index of the first distractor symbol |
| secondDistractor | Stores the index of the second distractor symbol |
| selectCompDistractor | Stores current index of the comparison distractor |
| tone1Duration | Stores the current duration of Tone1 |
| estimationRT | Latency of estimation (in ms) |
| response | The participant's response |
| correct | The correctness of the response (1 = correct; 0 = incorrect) relevant only for comp-distractor question |
| latency | The response latency (in ms) |
The procedure can be adjusted by setting the following parameters.
| Name | Description | Default |
|---|---|---|
| durationBtwTones | Posttrialpause after presenting tone1 in ms | 1000 |
| iti | Intertrialinterval, break inbetween main trial sequences in ms | 2000 |
| distractorDuration | Duration of the target distractors in ms | 1000 |
Tone1 Duration Settings (In Ms): The 5 Levels Of The Iv |
||
| t1: | 1000 | |
| t2: | the provided sound files last for max 20s(tone1)/25s(tone2); for longer durations | 2000 |
| t3: | These sound files need to be replaced | 3000 |
| t4: | 4000 | |
| t5: | 5000 | |