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Author(s): Rosa, P.
Gamito, P.
Oliveira, J.
Morais, D.
Pavlovic, M.
Smyth, O.
Maia, I.
Gomes, T.
Date: 2017
Title: Eye movement analysis and cognitive assessment: the use of comparative visual search tasks in a non-immersive vr application
Volume: 56
Number: 2
Pages: 112 - 116
ISSN: 0026-1270
DOI (Digital Object Identifier): 10.3414/ME16-02-0006
Keywords: Eye movements
Virtual reality
Comparative visual search task
Abstract: Background: An adequate behavioral response depends on attentional and mnesic processes. When these basic cognitive functions are impaired, the use of non-immersive Virtual Reality Applications (VRAs) can be a reliable technique for assessing the level of impairment. However, most non-immersive VRAs use indirect measures to make inferences about visual attention and mnesic processes (e.g., time to task completion, error rate). Objectives: To examine whether the eye movement analysis through eye tracking (ET) can be a reliable method to probe more effectively where and how attention is deployed and how it is linked with visual working memory during comparative visual search tasks (CVSTs) in non-immersive VRAs. Methods: The eye movements of 50 healthy participants were continuously recorded while CVSTs, selected from a set of cognitive tasks in the Systemic Lisbon Battery (SLB). Then a VRA designed to assess of cognitive impairments were randomly presented. Results: The total fixation duration, the number of visits in the areas of interest and in the interstimulus space, along with the total execution time was significantly different as a function of the Mini Mental State Examination (MMSE) scores. Conclusions: The present study demonstrates that CVSTs in SLB, when combined with ET, can be a reliable and unobtrusive method for assessing cognitive abilities in healthy individuals, opening it to potential use in clinical samples.
Peerreviewed: yes
Access type: Open Access
Appears in Collections:CIS-RI - Artigos em revistas científicas internacionais com arbitragem científica

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