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Perceiving and acting in depth in Williams syndrome and typical development

Hudson, Kerry D. and Farran, Emily K. (2014) Perceiving and acting in depth in Williams syndrome and typical development RESEARCH IN DEVELOPMENTAL DISABILITIES, 35 (8). pp. 1850-1855.

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Individuals with the neurodevelopmental disorder Williams syndrome (WS) often report difficulty processing and acting in depth, such as crossing roads or reaching for objects; however little research attention has been directed at understanding depth perception and action in depth in WS and whether deficits in depth perception have an ocular or perceptual root in this group. This study assessed the extent and relationship of deficits in stereopsis (binocular, three dimensional vision) and actions performed in depth in WS, as well as in typically developing participants (TD) matched for non-verbal ability. Stereoacuity was age-appropriate in the TD group but at the level of a TD three year old in WS; one third of the WS group did not show evidence of stereopsis. When monocularly acting in depth there was no difference between the WS and TD groups. When binocularly acting in depth the WS group that did not exhibit stereopsis were significantly poorer than the TD group and the WS group that exhibited stereopsis. When assessing the relationship between stereoacuity and action in depth, stereoacuity negatively correlated with binocular action in depth for the WS group with stereopsis, but not the TD group. Therefore, no deficits in monocular depth perception in WS were evidenced, yet significant deficits are exhibited in binocular depth perception and action. Importantly action in depth under binocular viewing may be a useful gross screening measure for stereodeficits in WS. Remediation of depth perception deficits in WS could train further understanding of monocular cues to compensate for poor stereopsis.

Item Type: Article
Divisions : Faculty of Health and Medical Sciences > School of Psychology
Authors :
Hudson, Kerry D.
Farran, Emily
Date : 1 August 2014
DOI : 10.1016/j.ridd.2014.04.013
Copyright Disclaimer : Copyright © 2014 Elsevier Ltd. All rights reserved.
Uncontrolled Keywords : Social Sciences, Science & Technology, Life Sciences & Biomedicine, Education, Special, Rehabilitation, Education & Educational Research, Williams syndrome, Depth perception, Stereopsis, Visually-guided action, Screening, Monocular vision, YOUNG-CHILDREN, 2-PENCIL TEST, STEREOPSIS, PERCEPTION, FINE
Depositing User : Diane Maxfield
Date Deposited : 26 Jun 2019 15:34
Last Modified : 26 Jun 2019 15:34

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