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Exploring cognition in visual search and vigilance tasks with eye tracking and pupillometry / JOEL MARTIN

Swansea University Author: JOEL MARTIN

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DOI (Published version): 10.23889/Suthesis.53842

Abstract

Recent findings in experimental psychology suggest that pupillometry, the measurement of pupil size, can provide insight into cognitive processes associated with effort and target detection in visual search tasks and monitoring performance in vigilance tasks. With the increasing availability, afford...

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Published: Swansea 2019
Institution: Swansea University
Degree level: Doctoral
Degree name: Ph.D
Supervisor: Johnston, Stephen J. ; Blagrove, Mark T.
URI: https://cronfa.swan.ac.uk/Record/cronfa53842
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first_indexed 2020-03-20T19:51:27Z
last_indexed 2020-09-17T03:17:18Z
id cronfa53842
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spelling v2 53842 2020-03-20 Exploring cognition in visual search and vigilance tasks with eye tracking and pupillometry b79ffebd92a315aa18bc9808bad78b26 JOEL MARTIN JOEL MARTIN true false 2020-03-20 Recent findings in experimental psychology suggest that pupillometry, the measurement of pupil size, can provide insight into cognitive processes associated with effort and target detection in visual search tasks and monitoring performance in vigilance tasks. With the increasing availability, affordability and flexibility of video-based eye tracking hardware, these experimental findings point to lucrative practical applications such as real-time biobehavioural monitoring systems to assist with socially important tasks in operational settings. The aim of the current thesis was to explore this potential with further experimental work paying close attention to methodological issues which complicate cognitive interpretations of pupillary responses, such as physical stimulus confounds and eye movement-related measurement error in video-based systems. Six original experiments were designed to specifically explore the relationship between pupil size, cognition and behavioural performance in classic visual search and vigilance paradigms. Experiments 1-2 examined the pupillometric effects of effort and target detection in visual search with briefly presented stimuli. Pupil responses showed small variability with respect to manipulations of set size and target presence but were influenced substantially by the requirement for a motor response. Experiments 3-4 explored the cognitive pupil dynamics of free-viewing visual search with data-driven correction for eye movement artefacts. Group-level averages revealed small transient pupil dilations following fixations on targets but not distractors, an effect which was not contingent on a motor response or correction for gaze position artefacts. Experiments 5-6 looked at the relationship between pupil size and detection performance measures in two types of vigilance task. Changes in baseline and stimulus-evoked pupil responses loosely mirrored changes in performance, but the relationships were neither linear nor consistent. Overall, the thesis affirms the practical potential for using cognitive pupillometry in research and applied settings, but emphasises the constraints arising from methodological and theoretical limitations. E-Thesis Swansea eye tracking, pupillometry, visual search, vigilance, cognition 31 1 2019 2019-01-31 10.23889/Suthesis.53842 Copyright: The Author, Joel Martin, 2020. All rights reserved.Due to Embargo and/or Third Party Copyright restrictions, this thesis is not available via this service. COLLEGE NANME COLLEGE CODE Swansea University Johnston, Stephen J. ; Blagrove, Mark T. Doctoral Ph.D Dstl 2023-07-14T13:09:59.8466944 2020-03-20T12:09:25.9848209 Faculty of Medicine, Health and Life Sciences School of Psychology JOEL MARTIN 1
title Exploring cognition in visual search and vigilance tasks with eye tracking and pupillometry
spellingShingle Exploring cognition in visual search and vigilance tasks with eye tracking and pupillometry
JOEL MARTIN
title_short Exploring cognition in visual search and vigilance tasks with eye tracking and pupillometry
title_full Exploring cognition in visual search and vigilance tasks with eye tracking and pupillometry
title_fullStr Exploring cognition in visual search and vigilance tasks with eye tracking and pupillometry
title_full_unstemmed Exploring cognition in visual search and vigilance tasks with eye tracking and pupillometry
title_sort Exploring cognition in visual search and vigilance tasks with eye tracking and pupillometry
author_id_str_mv b79ffebd92a315aa18bc9808bad78b26
author_id_fullname_str_mv b79ffebd92a315aa18bc9808bad78b26_***_JOEL MARTIN
author JOEL MARTIN
author2 JOEL MARTIN
format E-Thesis
publishDate 2019
institution Swansea University
doi_str_mv 10.23889/Suthesis.53842
college_str Faculty of Medicine, Health and Life Sciences
hierarchytype
hierarchy_top_id facultyofmedicinehealthandlifesciences
hierarchy_top_title Faculty of Medicine, Health and Life Sciences
hierarchy_parent_id facultyofmedicinehealthandlifesciences
hierarchy_parent_title Faculty of Medicine, Health and Life Sciences
department_str School of Psychology{{{_:::_}}}Faculty of Medicine, Health and Life Sciences{{{_:::_}}}School of Psychology
document_store_str 0
active_str 0
description Recent findings in experimental psychology suggest that pupillometry, the measurement of pupil size, can provide insight into cognitive processes associated with effort and target detection in visual search tasks and monitoring performance in vigilance tasks. With the increasing availability, affordability and flexibility of video-based eye tracking hardware, these experimental findings point to lucrative practical applications such as real-time biobehavioural monitoring systems to assist with socially important tasks in operational settings. The aim of the current thesis was to explore this potential with further experimental work paying close attention to methodological issues which complicate cognitive interpretations of pupillary responses, such as physical stimulus confounds and eye movement-related measurement error in video-based systems. Six original experiments were designed to specifically explore the relationship between pupil size, cognition and behavioural performance in classic visual search and vigilance paradigms. Experiments 1-2 examined the pupillometric effects of effort and target detection in visual search with briefly presented stimuli. Pupil responses showed small variability with respect to manipulations of set size and target presence but were influenced substantially by the requirement for a motor response. Experiments 3-4 explored the cognitive pupil dynamics of free-viewing visual search with data-driven correction for eye movement artefacts. Group-level averages revealed small transient pupil dilations following fixations on targets but not distractors, an effect which was not contingent on a motor response or correction for gaze position artefacts. Experiments 5-6 looked at the relationship between pupil size and detection performance measures in two types of vigilance task. Changes in baseline and stimulus-evoked pupil responses loosely mirrored changes in performance, but the relationships were neither linear nor consistent. Overall, the thesis affirms the practical potential for using cognitive pupillometry in research and applied settings, but emphasises the constraints arising from methodological and theoretical limitations.
published_date 2019-01-31T13:09:56Z
_version_ 1771397810927697920
score 10.969907

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