Perceptual Factors Influence Visual Search for Meaningful Symbols in Individuals with Intellectual Disabilities and Down Syndrome or Autism Spectrum Disorders

Autor/inn/en	Wilkinson, Krista M.; McIlvane, William J.
Titel	Perceptual Factors Influence Visual Search for Meaningful Symbols in Individuals with Intellectual Disabilities and Down Syndrome or Autism Spectrum Disorders
Quelle	In: American Journal on Intellectual and Developmental Disabilities, 118 (2013) 5, S.353-364 (12 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1944-7515
DOI	10.1352/1944-7558-118.5.353
Schlagwörter	Mental Retardation; Down Syndrome; Autism; Pervasive Developmental Disorders; Augmentative and Alternative Communication; Visual Perception; Influences; Color; Spatial Ability; Reaction Time; Accuracy; Comparative Analysis + Suchen Sie Ihr Suchwort? Geistige Behinderung; 'Downs Syndrome; Down''s Syndrome'; Down-Syndrom; Autismus; Visuelle Wahrnehmung; Influence; Einfluss; Einflussfaktor; Colour; Farbbezeichnung; Farbe; Räumliches Vorstellungsvermögen; Reaktionsvermögen
Abstract	Augmentative and alternative communication (AAC) systems often supplement oral communication for individuals with intellectual and communication disabilities. Research with preschoolers without disabilities has demonstrated that two visual--perceptual factors influence speed and/or accuracy of finding a target: the internal color and spatial organization of symbols. Twelve participants with Down syndrome and 12 with autism spectrum disorders (ASDs) completed two search tasks. In one, the symbols were clustered by internal color; in the other, the identical symbols had no arrangement cue. Visual search was superior in participants with ASDs compared to those with Down syndrome. In both groups, responses were significantly faster when the symbols were clustered by internal color. Construction of aided AAC displays may benefit from attention to their physical and perceptual features. (As Provided).
Anmerkungen	American Association on Intellectual and Developmental Disabilities. P.O. Box 1897, Lawrence, KS 66044-1897. Tel: 785-843-1235; Fax: 785-843-1274; e-mail: AJMR@allenpress.com; Web site: http://aaidd.allenpress.com
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10