Return to the Edinburgh Handedness Iniventory - Short Form page
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								*Edinburgh Handedness Inventory - Short Form*
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Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com) for Millisecond Software, LLC
last updated:  12-21-2020 by K. Borchert (katjab@millisecond.com) for Millisecond Software, LLC

Script Copyright © 12-21-2020 Millisecond Software

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BACKGROUND INFO 	
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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.

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OVERVIEW
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4 5-point Likert choice questions that ask about handedness
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DURATION 
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the default set-up of the script takes appr. less than 1 minute to complete

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DATA FILE INFORMATION 
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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)

computer.platform:					the platform the script was run on (win/mac/ios/android)
inquisit.build:						the version/build of Inquisit
script.startdate:					date script was run
script.starttime:					time script was started
script.subjectid:					assigned subject id number
script.groupid:						assigned group id number
script.sessionid:					assigned session id number
script.elapsedtime:					time it took to run script (in ms); measured from onset to offset of script
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									

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QUESTIONNAIRE SET-UP & SCORING
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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)