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PECS and VOCAs to enable students with developmental disabilities to make requests: An overview of the literature

Citation

Lancioni, GE and O'Reilly, M and Cuvo, AJ and Singh, N and Sigafoos, J and Didden, R, PECS and VOCAs to enable students with developmental disabilities to make requests: An overview of the literature, Research in Developmental Disabilities, 28, (5) pp. 468-488. ISSN 0891-4222 (2007) [Refereed Article]

DOI: doi:10.1016/j.ridd.2006.06.003

Abstract

This paper provides an overview of the literature dealing with the use of the Picture Exchange Communication System (PECS) and voice output communication aids (VOCAs) for promoting the performance of requests by students with developmental disabilities. Computerized and manual searches were carried out to identify the studies published during the last 15 years (i.e., the period between 1992 and 2006 during which PECS and VOCA approaches became popular). Thirty-seven studies were identified and then divided into three groups concerning the use of the PECS or equivalents, the use of VOCAs or equivalents, and the comparison of both these approaches, respectively. Of the 173 students involved in studies using the PECS or equivalents only three could be considered failures, while a fourth one did not progress in the program due to illness. Similarly, of the 39 students who used VOCAs or equivalents only three could be considered failures, while one was partly successful. Finally, of the 11 students involved in the comparisons between PECS and VOCAs none could be classified as a failure. The results are very encouraging but methodological concerns and the relatively limited use of the systems in terms of request items and request opportunities suggest caution. Caution may also be needed in interpreting the reported similarities between the two systems in usability and effectiveness. © 2006 Elsevier Ltd. All rights reserved.

Item Details

Item Type:Refereed Article
Research Division:Education
Research Group:Specialist Studies in Education
Research Field:Special Education and Disability
Objective Division:Education and Training
Objective Group:Other Education and Training
Objective Field:Special Needs Education
Author:Sigafoos, J (Professor Jeffrey Sigafoos)
ID Code:48695
Year Published:2007
Web of Science® Times Cited:72
Deposited By:Education
Deposited On:2007-08-01
Last Modified:2009-10-26
Downloads:0

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