Article InformationAuthors: Williams, G., Donley, C. R., & Keller, J. W.Year: 2000Publication: Journal of Applied Behavior AnalysisVolume: 33Issue: 4Pages: 627-630DOI: 10.1901/jaba.2000.33-627 Final Quality and Data Extraction DecisionsAge: 36-71.9 months (3-5.9 years)Domains: CommunicationIntervention: Prompting