___________________________________________________________________________________________________________________
*Eye Dominance Test ('Porac Test')*
- as part of the Behavioural Laterality Battery-
___________________________________________________________________________________________________________________
Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com) for Millisecond Software, LLC
Date: 12-29-2020
last updated: 03-29-2023 by K. Borchert (katjab@millisecond.com) for Millisecond Software, LLC
Script Copyright © 03-29-2023 Millisecond Software
___________________________________________________________________________________________________________________
BACKGROUND INFO
___________________________________________________________________________________________________________________
This script implements an adaption of the Porac Test of Ocular Dominance as used by the
Behavioural Laterality Battery (Parker et al, 2020)
References:
//Behavioural Laterality Battery:
Adam J. Parker , Zoe V. J. Woodhead , Paul A. Thompson & Dorothy V. M.
Bishop (2020): Assessing the reliability of an online behavioural laterality battery: A pre-registered
study, Laterality, DOI: 10.1080/1357650X.2020.1859526
To link to this article: https://doi.org/10.1080/1357650X.2020.1859526
https://gorilla.sc/openmaterials/104636
//Porac Test:
Porac, C., & Coren, S. (1976). Psychological bulletin, 83, 880.
https://doi.org/10.1037/0033-2909.83.5.880
___________________________________________________________________________________________________________________
TASK DESCRIPTION
___________________________________________________________________________________________________________________
Participants are asked to determine their ocular dominance by using their thumb or index finger
and centering them on a far away object. Then they are asked to close their left eye and then the right eye
to observe the location of the object:
the eye that keeps the object stationary is defined as the 'dominant' eye
___________________________________________________________________________________________________________________
DURATION
___________________________________________________________________________________________________________________
the default set-up of the script takes appr. 1 minutes to complete
___________________________________________________________________________________________________________________
DATA OUTPUT DICTIONARY
___________________________________________________________________________________________________________________
The fields in the data files are:
(1) Raw data file: 'eyedominancetest_poractest.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)
Scale: RIGHT, LEFT, DON'T KNOW
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: 'eyedominancetest_poractest_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)
radioButtons.oculardominance.response: the given response (LEFT, RIGHT, DON'T KNOW)
__________________________________________________________________________________________________________________
INSTRUCTIONS
___________________________________________________________________________________________________________________
provided by Parker et al (2020)
https://gorilla.sc/openmaterials/104636
