Article InformationAuthors: Harjusola-Webb, Sanna M.; Robbins, Sandra HessYear: 2012Publication: Topics in Early Childhood Special EducationVolume: 32Issue: 2Pages: 99-110DOI: 10.1177/0271121410397060 Final Quality and Data Extraction DecisionsAge: 36-71.9 months (3-5.9 years)Domains: CommunicationIntervention: Naturalistic intervention