Visual discomfort from flash afterimages of riloid patterns

O'Hare, Louise (2017) Visual discomfort from flash afterimages of riloid patterns. Perception, 46 (6). pp. 709-727. ISSN 0301-0066

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Visual discomfort from flash afterimages of riloid patterns
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Op-art-based stimuli have been shown to be uncomfortable, possibly due to a combination of fixational eye movements (microsaccades) and excessive cortical responses. Efforts have been made to measure illusory phenomena arising from these stimuli in the absence of microsaccades, but there has been no attempt thus far to decouple the effects of the cortical response from the effect of fixational eye movements. This study uses flash afterimages to stablise the image on the retina and thus reduce the systematic effect of eye movements, in order to investigate the role of the brain in discomfort from op-art-based stimuli. There was a relationship between spatial frequency and the magnitude of the P300 response, showing a similar pattern to that of discomfort judgements, which suggests there might be a role of discomfort and excessive neural responses independently from the effects of microsaccades.

Keywords:Visual discomfort
Subjects:C Biological Sciences > C830 Experimental Psychology
Divisions:College of Social Science > School of Psychology
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ID Code:25226
Deposited On:22 Nov 2016 15:37

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