Global motion perception is independent from contrast sensitivity for coherent motion direction discrimination and visual acuity in 4.5-year-old children

Vision Research
Arijit ChakrabortyBenjamin Thompson

Abstract

Global motion processing depends on a network of brain regions that includes extrastriate area V5 in the dorsal visual stream. For this reason, psychophysical measures of global motion perception have been used to provide a behavioral measure of dorsal stream function. This approach assumes that global motion is relatively independent of visual functions that arise earlier in the visual processing hierarchy such as contrast sensitivity and visual acuity. We tested this assumption by assessing the relationships between global motion perception, contrast sensitivity for coherent motion direction discrimination (henceforth referred to as contrast sensitivity) and habitual visual acuity in a large group of 4.5-year-old children (n=117). The children were born at risk of abnormal neurodevelopment because of prenatal drug exposure or risk factors for neonatal hypoglycemia. Motion coherence thresholds, a measure of global motion perception, were assessed using random dot kinematograms. The contrast of the stimuli was fixed at 100% and coherence was varied. Contrast sensitivity was measured using the same stimuli by fixing motion coherence at 100% and varying dot contrast. Stereoacuity was also measured. Motion coherence thresholds wer...Continue Reading

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Citations

Apr 25, 2017·Vision Research·Arijit ChakrabortyUNKNOWN for CHYLD, IDEAL Study Groups
Aug 24, 2017·Child Development·Mariagrazia BenassiKerstin Hellgren
Jul 19, 2019·Brain Injury : [BI]·Mohammed M AlnawmasiBenjamin Thompson
May 23, 2020·Scientific Reports·James W RobertsKristine Dalton
Oct 24, 2018·Proceedings of the National Academy of Sciences of the United States of America·Miriam Spering, Hiu Mei Chow
Mar 7, 2021·Journal of Experimental Child Psychology·Mariagrazia BenassiKerstin Hellgren
Jul 27, 2021·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Kai KrabbenDavid L Mann

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