Article InformationAuthors: Lawton, K.; Kasari, C.Year: 2012Publication: Journal of consulting and clinical psychologyVolume: 80Issue: 4Pages: 687-93DOI: 10.1037/a0028506 Final Quality and Data Extraction DecisionsAge: 36-71.9 months (3-5.9 years)Domains: Joint attentionPlayIntervention: Naturalistic interventionJoint Attention, Symbolic Play, Engagement, and Regulation (JASPER)