___________________________________________________________________________________________________________________ *TEMPORAL REPRODUCTION* ___________________________________________________________________________________________________________________ Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com) for Millisecond Software, LLC Date: 06-04-2013 last updated: 03-02-2022 by K. Borchert (katjab@millisecond.com) for Millisecond Software, LLC Script Copyright © 03-02-2022 Millisecond Software ___________________________________________________________________________________________________________________ BACKGROUND INFO ___________________________________________________________________________________________________________________ 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. ___________________________________________________________________________________________________________________ TASK DESCRIPTION ___________________________________________________________________________________________________________________ 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. ___________________________________________________________________________________________________________________ DURATION ___________________________________________________________________________________________________________________ the default set-up of the script takes appr. 8 minutes to complete ___________________________________________________________________________________________________________________ DATA FILE INFORMATION ___________________________________________________________________________________________________________________ The default data stored in the data files are: (1) Raw data file: 'remporalreproduction_raw*.iqdat' (a separate file for each participant) 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.. firstdistractor: stores the index of the first distractor symbol seconddistractor: stores the index of the second distractor symbol select_compdistractor: stores current index of the comparison distractor tone1duration: stores the current duration of Tone1 estimation_rt: latency of estimation (in ms) response: the participant's response correct: the correctness of the response (1 = correct; 0 = incorrect) Note: relevant only for comp-distractor question latency: the response latency (in ms) (2) Summary data file: 'temporalreproduction_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) distractortask_errorrate: recognition error proportion for distractortask mean_estimation_t1 -: mean estimation time (in ms) for t1 to t5 mean_estimation_t5 std_estimation_t1- : standard deviation of the estimation times for t1 to t5 std_estimation_t5 cv_t1-: coefficient of variation for t1 to t5 cv_t5 ___________________________________________________________________________________________________________________ EXPERIMENTAL SET-UP ___________________________________________________________________________________________________________________ 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 <Spacebar> after Tone 2 starts playing) *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 Note: 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) ___________________________________________________________________________________________________________________ STIMULI ___________________________________________________________________________________________________________________ provided by Millisecond Software - can be edited under section Editable Stimuli ___________________________________________________________________________________________________________________ INSTRUCTIONS ___________________________________________________________________________________________________________________ Instructions provided with this script are not the originals. Customize under section Editable Instructions ___________________________________________________________________________________________________________________ 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: /durationbtwtones: posttrialpause after presenting tone1 in ms(default: 1000) /ITI: intertrialinterval, break inbetween main trial sequences in ms (default: 2000) /distractorduration: duration of the target distractors in ms(default: 1000) tone1 duration settings (in ms): the 5 levels of the IV /t1 = 1000 /t2 = 2000 Note: the provided sound files last for max 20s(tone1)/25s(tone2); for longer durations /t3 = 3000 these sound files need to be replaced /t4 = 4000 /t5 = 5000