Tactile Attenuation of Visual Search Performance Deficiencies in Low Luminance Environments

  • Diverse adaptive visual processing mechanisms allow us to complete simple discrimination and more complex visual search tasks in a wide visual photopic range (> 0.6 cd/m2). Despite extensive research ranging from the psychophysical to neurophysiological disciplines, none has examined how these processes behave in the scotopic and low - mesopic luminance ranges, even though we still utilize these processes daily albeit facing considerable decreases in performance. Characterization of perceptual and environmental limitations are needed. Furthermore, visual performance is often enhanced by innate visual - tactile mechanisms, and if patterned properly, application of additional tactile information could attenuate observed decreases in the low luminance spectral ranges. This dissertation will first demonstrate novel behavioural performance efficiency functions for visual discrimination and visual search as one traverses the scotopic to low - mesopic luminance ranges. Second, will demonstrate how various properties of tactile encoding can either attenuate behavioural deficiencies or even facilitate normal performance. Third, these results are supported from both behavioural (eye tracking) and neurophysiological (event related potential) analyses, isolating critical temporal gating windows with more efficient search patterns mediated via a central - parietal network.

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Publishing Institution:IRC-Library, Information Resource Center der Jacobs University Bremen
Granting Institution:Jacobs Univ.
Author:Mathew Hunter
Referee:Ben Godde, Song Yan, Dieter Kutz, Bettina Olk
Advisor:Ben Godde
Persistent Identifier (URN):urn:nbn:de:gbv:579-opus-1009301
Document Type:PhD Thesis
Language:English
Date of Successful Oral Defense:2019/12/02
Date of First Publication:2020/09/30
Academic Department:Psychology & Methods
PhD Degree:Neuroscience
Focus Area:Diversity
Call No:2019/32

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