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

Krzysztof Krejtz , Andrew T. Duchowski , Anna Niedzielska , Cezary Biele , Izabela 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.
Author Krzysztof Krejtz (Wydział Psychologii)
Krzysztof Krejtz,,
- Wydział Psychologii
, Andrew T. Duchowski
Andrew T. Duchowski,,
-
, Anna Niedzielska
Anna Niedzielska,,
-
, Cezary Biele
Cezary Biele,,
-
, Izabela Krejtz (Wydział Psychologii)
Izabela Krejtz,,
- Wydział Psychologii
Journal seriesPlos One, ISSN 1932-6203, (A 40 pkt)
Issue year2018
Vol13
No9
Pages1-23
Publication size in sheets1.1
ASJC Classification1100 General Agricultural and Biological Sciences; 1300 General Biochemistry, Genetics and Molecular Biology; 2700 General Medicine
DOIDOI:10.1371/journal.pone.0203629
URL https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0203629
Languageen angielski
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K.Krejtz_Eye tracking cognitive.pdf 3.47 MB
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Oswiadczenie_K.Krejtz_Eye tracking.pdf 85.63 KB
Oświadczenie_publ IKrejtz_Eye Tracking.pdf 773.95 KB
Score (nominal)40
Score sourcejournalList
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2017 = 1.111; WoS Impact Factor: 2017 = 2.766 (2) - 2017=3.352 (5)
Citation count*48 (2020-10-01)
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