Visual Noise Effect on Contour Integration and Gaze Allocation in Autism Spectrum Disorder
| Autor: | Milena Mihaylova, Svetla Staykova, Nadejda Bocheva, Tsvetalin Totev |
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| Rok vydání: | 2021 |
| Předmět: |
medicine.medical_specialty
Visual perception genetic structures visual perception Audiology ASD 050105 experimental psychology lcsh:RC321-571 03 medical and health sciences 0302 clinical medicine mental disorders medicine Image noise 0501 psychology and cognitive sciences lcsh:Neurosciences. Biological psychiatry. Neuropsychiatry Original Research General Neuroscience 05 social sciences Eye movement medicine.disease external noise Gaze contour integration eye movements Noise Autism spectrum disorder Fixation (visual) Autism Psychology neural noise 030217 neurology & neurosurgery Neuroscience |
| Zdroj: | Frontiers in Neuroscience Frontiers in Neuroscience, Vol 15 (2021) |
| ISSN: | 1662-453X |
| Popis: | Contradictory results have been obtained in the studies that compare contour integration abilities in Autism Spectrum Disorders (ASDs) and typically developing individuals. The present study aimed to explore the limiting factors of contour integration ability in ASD and verify the role of the external visual noise by a combination of psychophysical and eye-tracking approaches. To this aim, 24 children and adolescents with ASD and 32 age-matched participants with typical development had to detect the presence of contour embedded among similar Gabor elements in a Yes/No procedure. The results obtained showed that the responses in the group with ASD were not only less accurate but also were significantly slower compared to the control group at all noise levels. The detection performance depended on the group differences in addition to the effect of the intellectual functioning of the participants from both groups. The comparison of the agreement and accuracy of the responses in the double-pass experiment showed that the results of the participants with ASD are more affected by the increase of the external noise. It turned out that the internal noise depends on the level of the added external noise: the difference between the two groups was non-significant at the low external noise and significant at the high external noise. In accordance with the psychophysical results, the eye-tracking data indicated a larger gaze allocation area in the group with autism. These findings may imply higher positional uncertainty in ASD due to the inability to maintain the information of the contour location from previous presentations and interference from noise elements in the contour vicinity. Psychophysical and eye-tracking data suggest lower efficiency in using stimulus information in the ASD group that could be caused by fixation instability and noisy and unstable perceptual template that affects noise filtering. |
| Databáze: | OpenAIRE |
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