Article InformationAuthors: Kasari, C., Freeman, S., & Paparella, T.Year: 2006Publication: Journal of Child Psychology and PsychiatryVolume: 47Issue: 6Pages: 611-620DOI: 10.1111/j.1469-7610.2005.01567.x Final Quality and Data Extraction DecisionsAge: 36-71.9 months (3-5.9 years)Domains: Joint attentionPlaySocialIntervention: Naturalistic interventionJoint Attention, Symbolic Play, Engagement, and Regulation (JASPER)