___________________________________________________________________________________________________________________ JUDGMENT OF LINE ANGLE AND POSITION TASK (JLAP) - 15 ___________________________________________________________________________________________________________________ Script Author: Sean Draine, Ph.D. (seandr@millisecond.com) for Millisecond Software LLC last updated: 02-24-2022 by K. Borchert (katjab@millisecond.com) for Millisecond Software, LLC Script Copyright © 02-24-2022 Millisecond Software ___________________________________________________________________________________________________________________ BACKGROUND INFO ___________________________________________________________________________________________________________________ This script implements a computerized Judgment of Line Angle and Position (JLAP-15) task; a measure of visuospatial ability known to reveal sex differences. The implemented procedure is based on: Collaer, M., Reimers, L., & Manning, S. (2007). Visuospatial Performance on an Internet Line Judgment Task and Potential Hormonal Markers: Sex, Sexual Orientation, and 2D:4D. Archives of Sexual Behavior, 36(2), 177-192. ___________________________________________________________________________________________________________________ TASK DESCRIPTION ___________________________________________________________________________________________________________________ Participants are given 20 lines (one at a time), presented at a specific angle, and have to select their equals out of 15 line options within 10s per line. ___________________________________________________________________________________________________________________ DURATION ___________________________________________________________________________________________________________________ the default set-up of the script takes appr. 3 minutes to complete ___________________________________________________________________________________________________________________ DATA FILE INFORMATION ___________________________________________________________________________________________________________________ The default data stored in the data files are: (1) Raw data file: 'jlap15_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 trialCount: trialcount (custom variable) targetLine: number of the current target line targetAngle: the angle of the target line selectedLine: number of the selected comparison line (0 = no reponse given; timed-out) Note: line 1 and line 15 are both correct responses for line 1 or 15. correctResponse:1 if judgment is correct, 0 if not latency: response time (in ms); measured from onset of trial until line is clicked or trial times out Angle Degree Data: trial.jlap.responseX: horizontal pixel of touch/mouse response trial.jlap.responseY: vertical pixel of touch/mouse response responseAngleDegrees: computed angle of response angleDiff: the absolute difference between the computed angle of response and targetAngle A) if the area under line 1 is selected, the response Area is determined to be '15' and responseAngleDegrees are negative btw. ~-168 > x > -180 => the script converts the responseAngleDegrees to the equivalent difference to 180 in order to calculate the meanAngleDifference e.g. -178 => converted to 182 B) line 1 and line 15 are both correct responses for line 1 or 15. The calculated angle difference takes this into consideration (2) Summary data file: 'jlap15_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) totalCorrect: total number of correct judgments totalErrors: total number of erroroneous judgments sumDiffErrors: sum of the differences between the target and judgment indices meanAngleDif: mean absolute difference between the computed angle of response and targetAngle (for all selected lines) Notes: A) if the area under line 1 is selected, the response Area is determined to be '15' and responseAngleDegrees are negative btw. ~-168 > x > -180 => the script converts the responseAngleDegrees to the equivalent difference to 180 in order to calculate the meanAngleDifference e.g. -178 => converted to 182 B) line 1 and line 15 are both correct responses for line 1 or 15. The calculated angle difference takes this into consideration ___________________________________________________________________________________________________________________ EXPERIMENTAL SET-UP ___________________________________________________________________________________________________________________ - 15 different angles/lines (though angle/lines 1 and 15 are essentially treated the same) - 20 line judgment trials, each presented for a max of 10s (editable parameters) - by default the lines are tested in sequence (same sequence as published by Collaer et al, 2007) (edit under section Editable Lists) ___________________________________________________________________________________________________________________ STIMULI ___________________________________________________________________________________________________________________ The lines are provided as images. __________________________________________________________________________________________________________________ INSTRUCTIONS ___________________________________________________________________________________________________________________ provided by Millisecond Software as html-files. The html files (see script folder) can be directly edited to change instructions. Use a simple text editor such as Notepad (windows) or TextEdit (Mac). ___________________________________________________________________________________________________________________ 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: /timeout: sets the response deadline (in ms) for each judgment (default: 10000ms = 10s) /feedback: true (1): provides performance feedback after each trial false (0): no performance feedback after each trial is provided (default)