Inclusion Criteria:  aged 2 years 0 months to 4 years 11 months low social-communication abilities indexed by Standardized Scores between 55 to 84 on the Socialization and/or Communication Domains of the Vineland Adaptive Behavior Scales - Third Edition parent/primary caregiver agrees to participate in the trial  Exclusion Criteria:  known neurological condition such as epilepsy known genetic disorder such as Down Syndrome hearing or visual impairment in the parent or child that could interfere with the intervention self-reported current psychiatric or neurological disorder in the parent that could interfere with the intervention