It's great you're looking into the impacts of ABA and ESDM therapy! A recent study showed that both Applied Behavior Analysis (ABA) and the Early Start Denver Model (ESDM) can lead to significant improvements in autism symptoms within six months.

ESDM was found to produce improvements across multiple developmental areas including personal-social development and hearing/speech, while ABA programs exhibited stronger effects on cognitive and adaptive outcomes. Even low-intensity ESDM (3 hours/week) can lead to clinically meaningful improvements. It's all about matching the therapy to the child's specific needs. You can find more details about the research at https://www.frontiersin.org/jo....urnals/child-and-ado and https://www.esdm.co/research-articles.