This study was carried out to examine the efficacy of a 12-week, low intensity (one-hour-per-week of therapist contact), parent-delivered intervention for toddlers at risk for autism spectrum disorders (ASD) ages 14–24 months and their families. Professionals can help families maximize intervention hours by (1) coaching them to provide high quality high frequency learning opportunities at home and (2) steering them to high quality interventions available in the community for