Examining the Effectiveness of the Early Start Denver Model in Community Programs Serving Young Autism

The investigators will collect data from leaders, providers and clients in participating autism CBAs. The investigators will collect data from 20 Regional Managers, 100 supervisors, and 200 technicians working with autistic children. Participants will include 300 children ages 1-5 years with a diagnosis of autism spectrum disorder living in the US and being served by participating treatment team. Inclusion criteria for Autism CBAs include: Serve at least 10 children with autism under age 5 annually and have at least 2 regions that can be randomized. Accept Medicaid or equivalent payment (e.g., funding for low income families through public service systems). Inclusion criteria for supervisors are as follows: 1. employed as a program supervisor at participating region 2. plans to be employed for at least the next 12 months 3. serves children with autism under age 5 4. has not has previous training in ESDM 5. supervises at least two technicians Inclusion criteria for technicians is as follows: 1. supervised by a participating supervisor 2. plans to be employed for at least the next 12 months 3. serves children with autism under age 5 4. has not had previous ESDM training Inclusion criteria for children are as follows: 1. child age 1-5 years 2. has a current autism spectrum disorder (ASD) diagnosis on record or is being served as at-risk for ASD if under age 3 3. family speaks English or Spanish 4. child expected to be in therapy for at least 7 months