___________________________________________________________________________________________________________________ Adaptive Paced Auditory Serial Addition Test (Adaptive PASAT) ___________________________________________________________________________________________________________________ Script Author: Jeffrey Q. Ouyang for Millisecond Software, LLC last updated: 02-25-2022 by K. Borchert (katjab@millisecond.com) for Millisecond Software, LLC Script Copyright © 02-25-2022 Millisecond Software __________________________________________________________________________________________________________________ BACKGROUND INFO ___________________________________________________________________________________________________________________ This script implements a computerized version of the Adaptive Paced Auditory Serial Addition Test (PASAT), a measure of information processing rate. The procedure is adaptive in that the presentation rate of the digits adapts to performance. The implemented procedure is based on: regular PASAT: Gronwall, D. (1977). Paced auditory serial-addition task: a measure of recovery from concussion. Perceptual and Motor Skills, 44, 367–373. adaptive PASAT: Siegle, G. J., Ghinassi, F., & Thase, M. E. (2007). Neurobehavioral therapies in the 21st century: Summary of an emerging field and an extended example of cognitive control training for depression. Cognitive Therapy and Research, 31(2), 235–262. doi: 10.1007/s10608-006-9118-6 ___________________________________________________________________________________________________________________ TASK DESCRIPTION ___________________________________________________________________________________________________________________ Participants hear a sequence of single digit numbers (1-9) presented at a constant speed and are asked to mentally sum the last 2 digits (NOT a running total). Participants then select the current sum from a circle of numbers 1-18 (= nonverbal response). The speed with which the numbers are presented adapts to the performance of the participant ___________________________________________________________________________________________________________________ DURATION ___________________________________________________________________________________________________________________ the default set-up of the script takes appr. 10 minutes to complete ___________________________________________________________________________________________________________________ DATA FILE INFORMATION ___________________________________________________________________________________________________________________ The default data stored in the data files are: (1) Raw data file: 'pasat_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. countTestBlocks: custom test block counter SOA: the currently used SOA (in ms); Stimulus Onset Asynchrony currentLevel: the currently tested level currentDigit: the currently presented digit currentSum: the current correct sum response: the participant's response (selected number) correct: the correctness of the response (1 = correct; 0 = incorrect) latency: the response latency (in ms); measured from onset of digit NR: 1 = no response was made within response window; 0 = otherwise (=no response) error: 1 = addition error; 0 = otherwise suppressionFailure: 1 = response is consistent with using previous sum (not digit) to generate new sum; 0 = otherwise consecutiveCorrect: counts the strings of consecutive correct responses Reset each time an error is made consecutiveErrors: counts the strings of consecutive error responses Reset each time a correct response is made (2) Summary data file: 'pasat_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) countCorrect: counts the number of correct responses across all test blocks countNR: counts the number of no responses countErrors: counts the number of addition errors across all test blocks (could include random selections) countSF: counts the number of suppression failures across all test blocks mean_consecutiveCorrect: the mean number of consecutive Correct responses across all test blocks median_consecutiveCorrect: the median number of consecutive Correct responses across all test blocks min_consecutiveCorrect: the minimum number of consecutive Correct responses across all test blocks max_consecutiveCorrect: the maximum number of consecutive Correct responses across all test blocks mean_consecutiveErrors: the mean number of consecutive error responses across all test blocks median_consecutiveErrors: the median number of consecutive error responses across all test blocks min_consecutiveErrors: the minimum number of consecutive error responses across all test blocks max_consecutiveErrors: the maximum number of consecutive error responses across all test blocks meanSOA: mean SOA (in ms) across all test blocks sd_SOA: standard deviation (in ms) of all SOAs across all test blocks minSOA: minimum SOA (in ms) across all test blocks ___________________________________________________________________________________________________________________ EXPERIMENTAL SET-UP ___________________________________________________________________________________________________________________ (I) Practice: * 11 practice trials (+ start trial) * provides feedback * default SOA: 4000ms (SOA = stimulus onset asynchrony => every 4 seconds a new number is presented) (II) Test: * by default, this script runs 4 test blocks * by default, the first block starts with SOA = 3000ms (SOA = stimulus onset asynchrony => every 3 seconds a new number is presented) (a parameters setting controls whether all blocks start with 3000ms or whether SOAs carry over from one block to the next) * SOAs are adapted in the following way: - after 4 (default) consecutive correct responses, the SOA gets decreased by 100ms (default) - after 4 (default) consecutive error responses, the SOA gets increased by 100ms (default) * each test block runs for 5 minutes (default) Trial Sequence: verbal digit presentation (SOA: varies): select sum of last 2 digits from a circle of numbers 1-18 __________________________________________________________________________________________________________________ INSTRUCTIONS ___________________________________________________________________________________________________________________ provided by Millisecond Software - can be edited under section Editable Instructions Instructions are not original to the task. They are provided by Millisecond Software as htm pages and can be edited by changing the provided html files. To edit 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 values, 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 values you can change are: /circleproportion: proportion of canvas height used for the circle radius of response buttons (default: 0.4) /practiceTrials: number of practice trials to run /SOAPractice: Stimulus Onset Asynchrony (SOA) in practice trials (= trialduration) / testBlockDuration: the duration (in ms) of each test block (default: 300000ms = 5 minutes) / numberTestBlocksToRun: the number of test blocks to run (default: 4) / continuousSOAsAcrossBlocks true (1): only the first test blocks starts with maxSOA of 3000ms; the SOAs carry over for the remaining test blocks (default) false (0): all test blocks start with maxSOA of 3000ms / maxSOA: the maximum SOA (in ms) used in this script (default: 3000ms) Note: this is also the starting SOA / minSOA: the minimum SOA (in ms) used in this script (default: 1000ms) / SOAchange: the ms increase or decrease if SOA needs to be adapted (default: 100ms) / SOAadaptionCriterium: the number of correct(error) trials after which SOA needs to be adapted /debugmode: 1 = the correct answer is displayed on the screen 0 = the correct answer is not displayed on the screen (default)