Article InformationAuthors: Matsuzaki, Atsuko; Yamamoto, Jun-ichiYear: 2012Publication: Japanese Journal of Special EducationVolume: 49Issue: 6Pages: 657-669DOI: 10.6033/tokkyou.49.657 Final Quality and Data Extraction DecisionsAge: 36-71.9 months (3-5.9 years)Domains: CommunicationJoint attentionSocialIntervention: Naturalistic interventionPivotal Response Training (PRT)