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The gaze relational index as a measure of visual expertise

  • Eye tracking is a powerful technique that helps reveal how people process visual information. This paper discusses a novel metric for indicating expertise in visual information processing. Named the Gaze Relational Index (GRI), this metric is defined as the ratio of mean fixation duration to fixation count. Data from two eye-tracking studies of professional vision and visual expertise in using 3D dynamic medical visualizations are presented as cases to illustrate the suitability and additional benefits of the GRI. Calculated values of the GRI were higher for novices than for experts, and higher in non-representative, semi-familiar / unfamiliar task conditions than in domain-representative familiar tasks. These differences in GRI suggest that, compared to novices, experts engaged in more knowledge-driven, top-down processing that was characterized by quick, exploratory visual search. We discuss future research aiming to replicate the GRI in professional domains with complex visual stimuli and to identify the moderating role of cognitive ability on GRI estimates.

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Metadaten
Author:Andreas Gegenfurtner, Jean-Michel Boucheix, Hans Gruber, Florian HauserORCiD, Erno Lehtinen, Richard K. Lowe
URL / DOI:https://www.journalofexpertise.org/articles/volume3_issue1/JoE_3_1_Gegenfurtner.pdf
ISSN:2573-2773
Parent Title (English):Journal of Expertise
Publisher:Michigan State University
Document Type:Article
Language:English
Year of first Publication:2020
Release Date:2022/04/26
Tag:visual expertise
eye tracking; fixations; information processing; professional vision
Volume:3
Issue:March
First Page:32
Last Page:40
Institutes:Fakultät Elektro- und Informationstechnik
Fakultät Elektro- und Informationstechnik / Laboratory for Safe and Secure Systems (LAS3)
Begutachtungsstatus:peer-reviewed
research focus:Information und Kommunikation
OpenAccess Publikationsweg:Diamond Open Access - OA-Veröffentlichung ohne Publikationskosten (Sponsoring)
Licence (German):Creative Commons - CC BY - Namensnennung 4.0 International