Psychophysical measures of visual acuity in autism spectrum conditions

Tavassoli, Teresa and Latham, Keziah and Bach, Michael and Dakin, Steven C. and Baron-Cohen, Simon (2011) Psychophysical measures of visual acuity in autism spectrum conditions. Vision Research. ISSN 0042-6989

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Abstract

Previously reported superior visual acuity (VA) in autism spectrum conditions (ASC) may have resulted from methodological settings used (Ashwin, Ashwin, Rhydderch, Howells, & Baron-Cohen, 2009). The current study re-tested whether participants with (N = 20) and without (N = 20) ASC differ on psychophysical measures of VA. Participants’ vision was corrected before acuity measurement, minimising refractive blur. VA was assessed with an ETDRS chart as well as the Freiburg Visual Acuity and Contrast Test (FrACT). FrACT testing was undertaken at 4 m (avoiding limitations of pixel-size), using 36 trials (avoiding fatigue). Best corrected VA was significantly better than the initial habitual acuity in both groups, but adults with and without ASC did not differ on ETDRS or FrACT binocular VA. Future research should examine at which level of visual processing sensory differences emerge

Item Type: Journal Article
Additional Information: Citation: Tavassoli, T., Latham, K., Bach, M., Dakin, S.C. and Baron-Cohen, S., 2011. Psychophysical measures of visual acuity in autism spectrum conditions. Vision Research, 51(15), pp.1778-1780..
Faculty: Faculty of Science & Technology
Depositing User: Mr I Walker
Date Deposited: 11 Jul 2013 10:19
Last Modified: 03 Jul 2017 09:19
URI: http://arro.anglia.ac.uk/id/eprint/295763

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