Extending the Parent-Delivered Early Start Denver Model to Young Children with Fragile X Syndrome.

Pitchford et al. (2019) asked parents of toddlers with fragile X syndrome to deliver the Early Start Denver Model at home. Therapists taught moms and dads the ESDM strategies during weekly 1-hour visits over the study period. The team then checked if parents could use the tricks correctly and how the kids responded on language, social, and autism tests.

Every parent reached good fidelity scores, meaning they used ESDM the right way. Parents also said they liked the program. Yet child scores went up on some measures and stayed flat on others, so overall progress was mixed. In short: parents can learn the model, but child gains are still a question mark.

Older case-series by Jones et al. (1998) and Olsson et al. (2001) showed that autistic behaviors in fragile X boys predict slower development. Those papers did not test any treatment, so Pitchford et al. (2019) is the next logical step—try an autism-informed parent program for the same kids.

Reid et al. (2017) also tried home parent coaching, but for toddlers with FASD. Both studies found the approach feasible and acceptable, strengthening the idea that parents can deliver evidence-based strategies for genetic syndromes at home.

Garcia Torres et al. (2024) extended parent training to Colombian autism families dealing with puberty. Together these papers stretch parent-mediated models across cultures and ages, showing the method keeps working even when you move beyond U.S. toddlers.

If you serve fragile X families, you now know ESDM can be taught to parents in three months. Start with a brief fidelity checklist and weekly coaching, just like the study. Keep your eye on child data, because parent skill does not guarantee child progress—plan extra supports or longer timelines when gains stall.