Trial of Center-Based vs. In-Home Pivotal Response Treatment (PRT) in Autism

Diagnosis of Autism Spectrum Disorder (ASD) based on Autism Diagnostic Interview Revised (ADI-R), Autism Diagnostic Observation Schedule, Second Edition (ADOS-2) or Childhood Autism Rating Scale, Second Edition (CARS-2), Diagnostic and Statistical Manual 5th Edition (DSM-5), and expert clinical opinion;

Boys and girls between 2.0 and 5.11 years;

Ability to participate in the testing procedures to the extent that valid standard scores can be obtained;

Language delay as measured by the Preschool Language Scale, 5th Edition (PLS-5): Standard score at least 1 standard deviation below average for expressive language ability for 2 and 3 year olds; 2 standard deviations for 4 year olds, and 3 standard deviations for 5 year olds;