Eye tracking cognitive load using pupil diameter and microsaccades with fixed gaze

PloS One
Krzysztof KrejtzIzabela Krejtz

Abstract

Pupil diameter and microsaccades are captured by an eye tracker and compared for their suitability as indicators of cognitive load (as beset by task difficulty). Specifically, two metrics are tested in response to task difficulty: (1) the change in pupil diameter with respect to inter- or intra-trial baseline, and (2) the rate and magnitude of microsaccades. Participants performed easy and difficult mental arithmetic tasks while fixating a central target. Inter-trial change in pupil diameter and microsaccade magnitude appear to adequately discriminate task difficulty, and hence cognitive load, if the implied causality can be assumed. This paper's contribution corroborates previous work concerning microsaccade magnitude and extends this work by directly comparing microsaccade metrics to pupillometric measures. To our knowledge this is the first study to compare the reliability and sensitivity of task-evoked pupillary and microsaccadic measures of cognitive load.

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Citations

Mar 4, 2020·Neurological Sciences : Official Journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology·Ling TaoLi Feng
Jul 7, 2020·Advances in Physiology Education·Annabel Pink, Philip M Newton
Jun 20, 2020·Human Factors·Francesco N BiondiPrathamesh Ayare
Oct 9, 2020·Cognitive Science·Rosy SouthwellSidney K D'Mello
Mar 23, 2021·Frontiers in Human Neuroscience·Jui-Tai ChenChin-An Wang
Aug 18, 2021·PloS One·Efe BozkirEnkelejda Kasneci
Aug 17, 2021·Technology and Health Care : Official Journal of the European Society for Engineering and Medicine·Michael S FineElizabeth B Brokaw
Sep 19, 2021·Communications Biology·Andrea ZangrossiMaurizio Corbetta
Sep 29, 2021·Human Factors·Francesco N BiondiJoel A Cort
Oct 31, 2021·The European Journal of Neuroscience·Chin-An Wang, Douglas P Munoz
Nov 17, 2021·Journal of Sport & Exercise Psychology·Alessandro PirasMilena Raffi
Feb 20, 2020··Robert W. LindemanTad T. Brunyé
May 27, 2020··Krzysztof KrejtzNina A. Gehrer
May 30, 2019··Justyna Żurawska, Justyna Żurawska
May 30, 2019··Brendan John, Brendan John

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