Object-based and action-based visual perception in children with spina bifida and hydrocephalus.

Full Abstract

Children with spina bifida and hydrocephalus (SBH) have long been known to have difficulties with visual perception. We studied how children with SBH perform 12 visual perception tasks requiring object identification, multistable representations of visual space, or visually guided overt actions. Four tasks required object-based processing (visual constancy illusions, face recognition, recognition of fragmented objects, line orientation). Four tasks required the representation of visual space in egocentric coordinates (stereopsis, visual figure-ground identification, perception of multistable figures, egocentric mental rotation). Four tasks required the coupling of visual space to overt movement (visual pursuit, figure drawing, visually guided route finding, visually guided route planning). Effect sizes, measuring the magnitude of the difference between SBH children and controls, were consistently larger for action-based than object-based visual perception tasks. Within action-based tasks, effect sizes were large and roughly comparable for tasks requiring the representation of visual space and for tasks requiring visually guided action. The results are discussed in terms of the physical and brain problems of children with SBH that limit their ability to build effective situation models of space.

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Author information

Author/s: Dennis, Maureen (M); Fletcher, Jack M (JM); Rogers, Tracey (T); Hetherington, Ross (R); Francis, David J (DJ);

Affiliation: Department of Psychology, The Hospital for Sick Children, Toronto, ON, Canada. mdennis(-atsign-)sickkids.on.ca

Grants: P01 HD 35946 (Agency:NICHD NIH HHS)

Journal and publication information

Publication Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.

Journal: Journal of the International Neuropsychological Society : JINS (J Int Neuropsychol Soc), published in England. (Language: eng)

Reference: 2002-Jan; vol 8 (issue 1) : pp 95-106

Dates: Created 2002/02/14; Completed 2002/03/06; Revised 2007/11/14;

PMID: 11843078, status: MEDLINE (last retrieval date: 12/26/2008)

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Adolescent
Case-Control Studies
Child
Female
Humans
Hydrocephalus - etiology; physiopathology; psychology

Male
Pattern Recognition, Visual
Psychomotor Performance
Space Perception
Spinal Dysraphism - complications; physiopathology
Visual Perception

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