Effectiveness of the Picture Exchange Communication System (PECS) on Communication and Speech for Children With Autism Spectrum Disorders: A Meta-Analysis Purpose The Picture Exchange Communication System (PECS) is a popular communication-training program for young children with autism spectrum disorders (ASD). This meta-analysis reviews the current empirical evidence for PECS in affecting communication and speech outcomes for children with ASD. Method A systematic review of the literature on PECS ... Research Article
Research Article  |   May 01, 2010
Effectiveness of the Picture Exchange Communication System (PECS) on Communication and Speech for Children With Autism Spectrum Disorders: A Meta-Analysis
 
Author Affiliations & Notes
  • Michelle Flippin
    University of North Carolina at Chapel Hill
  • Stephanie Reszka
    University of North Carolina at Chapel Hill
  • Linda R. Watson
    University of North Carolina at Chapel Hill
  • Contact author: Michelle Flippin, UNC—Chapel Hill Division of Speech & Hearing Sciences, Bondurant Hall, CB 7190, Chapel Hill, NC 27599. E-mail: mflippin@unc.edu.
Article Information
Augmentative & Alternative Communication / Special Populations / Autism Spectrum / Research Articles
Research Article   |   May 01, 2010
Effectiveness of the Picture Exchange Communication System (PECS) on Communication and Speech for Children With Autism Spectrum Disorders: A Meta-Analysis
American Journal of Speech-Language Pathology, May 2010, Vol. 19, 178-195. doi:10.1044/1058-0360(2010/09-0022)
History: Received March 19, 2009 , Revised June 30, 2009 , Accepted January 25, 2010
 
American Journal of Speech-Language Pathology, May 2010, Vol. 19, 178-195. doi:10.1044/1058-0360(2010/09-0022)
History: Received March 19, 2009; Revised June 30, 2009; Accepted January 25, 2010
Web of Science® Times Cited: 48

Purpose The Picture Exchange Communication System (PECS) is a popular communication-training program for young children with autism spectrum disorders (ASD). This meta-analysis reviews the current empirical evidence for PECS in affecting communication and speech outcomes for children with ASD.

Method A systematic review of the literature on PECS written between 1994 and June 2009 was conducted. Quality of scientific rigor was assessed and used as an inclusion criterion in computation of effect sizes. Effect sizes were aggregated separately for single-subject and group studies for communication and speech outcomes.

Results Eight single-subject experiments (18 participants) and 3 group studies (95 PECS participants, 65 in other intervention/control) were included. Results indicated that PECS is a promising but not yet established evidence-based intervention for facilitating communication in children with ASD ages 1–11 years. Small to moderate gains in communication were demonstrated following training. Gains in speech were small to negative.

Conclusions This meta-analysis synthesizes gains in communication and relative lack of gains made in speech across the PECS literature for children with ASD. Concerns about maintenance and generalization are identified. Emerging evidence of potential preintervention child characteristics is discussed. Phase IV was identified as a possibly influential program characteristic for speech outcomes.

Acknowledgment
The authors thank Necdet Karasu for his advice on calculating effect sizes in single-subject research.
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