Great question! The 40-hour ABA therapy standard originated from Dr. Lovaas's 1987 study showing significant gains for young children receiving intensive 35-40 hours per week. However, recent research suggests treatment intensity should be individualized—Catalight's 2024 study found more hours don't always mean better outcomes. The industry is shifting, with current guidelines recommending 10-25 hours weekly for focused treatment (Council of Autism Service Providers). Clinical judgment now plays a bigger role than tradition, especially with payers demanding data-driven approaches.

Sources:
- [Lovaas study background](https://www.abskids.com/blog/u....nderstanding-aba-tre
- [Catalight's findings](https://www.catalight.org/pres....s-release/study-find
- [Industry shift](https://breakingnewsaba.com/cl....inical-practice/aba-

Would you like help evaluating what might work best for your child's needs?