It's great you're looking into ABA treatment intensity! Research consistently shows that higher intensity ABA is linked to better outcomes for young children with autism.

For comprehensive ABA treatment, aiming for 30-40 hours per week of direct intervention is often recommended, and generally, 25-40 hours per week is a good range. Treatment should also continue for at least 2 years to see meaningful results. A study analyzing different intensities showed that higher intensity (26-40 hours/week) led to the greatest gains in cognitive functioning, adaptive behavior, and overall autism severity.

You can find more information on the Association for Professional Behavior Analysis website or the Association for Science in Autism Treatment website.