Work

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

Year: 2013

Type: article

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.

Source: American Journal on Intellectual and Developmental Disabilities

DOI: 10.1352/1944-7558-118.5.353

Authors: Krista M. Wilkinson, William J. McIlvane

Institutions: Pennsylvania State University, University of Massachusetts Chan Medical School, Eunice Kennedy Shriver Center

Language: English

Topic: Assistive Technology in Communication and Mobility

Subfield: Occupational Therapy

Field: Health Professions

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: bronze

Funders: American Speech-Language-Hearing Association, National Institutes of Health, Eunice Kennedy Shriver National Institute of Child Health and Human Development