Title

Perceptual factors influence visual search for meaningful symbols in individuals with intellectual disabilities and down syndrome or autism spectrum disorders

UMMS Affiliation

Shriver Center; Intellectual and Developmental Disabilities Research Center

Date

9-2013

Document Type

Article

Disciplines

Communication | Experimental Analysis of Behavior | Neuroscience and Neurobiology | Psychiatry and Psychology

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.

Comments

Citation: Wilkinson KM, McIlvane WJ. Perceptual factors influence visual search for meaningful symbols in individuals with intellectual disabilities and Down syndrome or autism spectrum disorders. Am J Intellect Dev Disabil. 2013 Sep;118(5):353-64. doi: 10.1352/1944-7558-118.5.353. PubMed PMID: 24245729; PubMed Central PMCID: PMC3889128. Link to article on publisher's site

Related Resources

Link to Article in PubMed

Keywords

Augmentative communication, Severe disabilities, Visual search, Display design

PubMed ID

24245729