Martin, Joel Thomas (2020) Component processes in free-viewing visual search: Insights from fixation-aligned pupillary response averaging. Journal of Vision. ISSN 1534-7362
Abstract
Pupil size changes during a visual search may reflect cognitive processes, such as effort and memory accumulation, but methodological confounds and the general lack of literature in this area leave the reliability of findings open to question. We used a novel synthesis of experimental methods and averaging techniques to explore how cognitive processing unfolds during free-viewing visual search for multiple targets. Twenty-seven participants completed 152 searches across two separate 1-hour sessions. The number of targets present (Targets: 0, 1, 2, and 3) in each trial was the main manipulation and the task was to “find all of the targets” and report the total via mouse-click at the end of the trial. Search time lasted for 10 seconds or until the participant purported to have found all of the targets, in which case they could terminate the search via keypress. Whole-trial pupil analysis revealed a significant effect of button pressing as well as a significant main effect of targets for trials that were not self-terminated via button press. Fixation-aligned pupil responses revealed transient modulations in pupil size following initial fixations on targets but not distractors and refixations on both targets and distractors. Owing to rigorous control over experimental confounds and a detailed analysis and correction of eye-movement-related measurement error, we confidently discuss these findings in terms of task-related processing and underlying brain activity.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020 The Author(s). |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Psychology (York) |
Depositing User: | Pure (York) |
Date Deposited: | 03 Jan 2023 11:00 |
Last Modified: | 17 Dec 2024 00:25 |
Published Version: | https://doi.org/10.1167/jov.20.7.5 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1167/jov.20.7.5 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:194711 |
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Description: Martin, Whittaker, Johnston - 2020 - Journal of vision - Component processes in free-viewing visual search Insights from fixation-aligne
Licence: CC-BY 2.5