___________________________________________________________________________________________________________________ *PROSPECTIVE TIME ESTIMATION* ___________________________________________________________________________________________________________________ Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com) for Millisecond Software, LLC Date: 06-24-2013 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 a Prospective Time Estimation procedure similarly to the one 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. (p.184) ___________________________________________________________________________________________________________________ TASK DESCRIPTION ___________________________________________________________________________________________________________________ Participants are asked to estimate a time interval that starts with the presentation of a green circle and a recording saying "start" and ends with the presentation of a red circle and the sound of an alarm. After pressing the Spacebar to turn off the alarm, participants are asked to estimate the duration of the time interval on a slider with 1s increments (0-3min). ___________________________________________________________________________________________________________________ DURATION ___________________________________________________________________________________________________________________ the default set-up of the script takes appr. 1 minute to complete ___________________________________________________________________________________________________________________ DATA FILE INFORMATION ___________________________________________________________________________________________________________________ The default data stored in the data files are: (1) Raw data file: 'prospectivetimeestimation_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. (parameter) timeinterval: time interval to estimate in ms (default: 53000ms = 53s) intervalestimation: stores the participant's estimation in s latency: the response latency (in ms) (2) Summary data file: 'prospectivetimeestimation_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) timeinterval: time interval to estimate in ms (default: 53000ms = 53s) intervalestimation: stores the participant's estimation in s ___________________________________________________________________________________________________________________ EXPERIMENTAL SET-UP ___________________________________________________________________________________________________________________ Participants are played a tone for a set time interval (editable). Afterwards they have to estimate the length of the time interval via a slider-response ___________________________________________________________________________________________________________________ STIMULI ___________________________________________________________________________________________________________________ see section Editable Stimuli ___________________________________________________________________________________________________________________ INSTRUCTIONS ___________________________________________________________________________________________________________________ Instructions are not original to the task. They are provided by Millisecond Software as htm/html pages and can be edited by changing the provided htm/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: /timeinterval: time interval to estimate in ms (default: 53000ms = 53s) Note: if time interval is changed, slider.te_response may have to be adapted accordingly /pretrialpause: pause in ms (empty screen) before green circle appears after starting the task