___________________________________________________________________________________________________________________ *Edinburgh Handedness Inventory - Short Form* ___________________________________________________________________________________________________________________ Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com) for Millisecond Software, LLC last updated: 02-22-2022 by K. Borchert (katjab@millisecond.com) for Millisecond Software, LLC Script Copyright © 02-22-2022 Millisecond Software ___________________________________________________________________________________________________________________ BACKGROUND INFO ___________________________________________________________________________________________________________________ This script implements the Edinburgh Handedness Inventory - Short Form (Veale, 2014) Reference: Veale, J.F. (2014). Edinburgh Handedness Inventory - Short Form: A revised version based on confirmatory factor analysis. Laterality, 19, 164-177. original Edinburgh Handedness Inventory: Oldfield, R.C. (1971). The assessment and analysis of handedness: The Edinburgh inventory. Neuropsychologia, 9, 97-113. ___________________________________________________________________________________________________________________ OVERVIEW ___________________________________________________________________________________________________________________ 4 5-point Likert choice questions that ask about handedness ___________________________________________________________________________________________________________________ DURATION ___________________________________________________________________________________________________________________ the default set-up of the script takes appr. less than 1 minute to complete ___________________________________________________________________________________________________________________ DATA FILE INFORMATION ___________________________________________________________________________________________________________________ The default data stored in the data files are: (1) Raw data file: 'edinburghhandednessinventory_sf.iqdat' date, time: date and time script was run with the current group/subjectnumber subject, group, session: with the current subject/groupnumber/session id build: the Inquisit build q*_response: response given (in assigned values) for q1-q4 Scale: -100 (always left) - +100 (always right) q*_latency: how much time (in ms) the participant spent on the surveypage with this particular question (the last time this particular surveypage was visited) (2) Summary data file: 'edinburghhandednessinventory_sf_summary.iqdat' (Inquisit Lab: one data file per 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) ehi_sf_countMissingitems: the number of questions that have not been answered Note: by default settings, all questions are required to be answered. However, that setting can be changed. If default setting is changed, the above variable can be used as a flag. ehi_sf_total: sum of all handedness questions 1 to 4 (default range: -400 - +400) //see Veale (2014) for scoring ehi_sf_LQ: Laterality Quotient: mean of all responded to questions (default range: -100 - +100) -100 - -61: Left handers -60 - +60: Mixed handers 61 - 100: Right handers + individual responses to all 4 questions ___________________________________________________________________________________________________________________ QUESTIONNAIRE SET-UP & SCORING ___________________________________________________________________________________________________________________ 4 5-point Likert choice questions that ask about handedness. The response scale "-100 (always left) - +100 (always right)". Scoring in Veale (2014, p. 15)