It's great you're looking into ABA and ESDM therapies! Research shows that both can lead to lasting improvements in social, behavioral, cognitive, and language skills when started early, ideally between 12-48 months.

For intensive ABA (26-40 hours/week), studies show greater improvements in IQ, behavior, and autism symptoms. ESDM has shown long-term benefits in reducing repetitive behaviors. A recent study suggests that moderate intensity intervention may be enough.

It's important to start early and track progress using standardized tools. Also, consider your child's individual needs and integrate therapy into natural settings. Here's a study about long-term ESDM gains: https://www.thetransmitter.org..../spectrum/early-ther