Uncovering the evidence for behavioral interventions with individuals with fragile X syndrome: a systematic review.
Only 31 small studies support behavioral help for fragile X—use caution and keep collecting data.
01Research in Context
What this study did
The team hunted for every paper that tested a behavioral program for people with fragile X. They found 31 studies published between 1980 and 2013. Most had fewer than ten kids. Only a handful used true control groups.
What they found
The 31 papers all said the same thing: kids learned new skills and parents liked the help. But the studies were tiny and weak. No one can say yet which tricks work best or how long gains last.
How this fits with other research
Cornish et al. (2012) is one of the 31 papers. Their three-year follow-up showed attention scores can forecast later IQ in FXS boys. The review keeps that hope alive.
Keintz et al. (2011) is also inside the review. They found FXS boys struggle most with verbal working memory. Again, the review counts this as thin but useful evidence.
Reichow (2012) tells a happier story for autism. Five meta-analyses back early ABA for ASD. The FXS review has no such pile-up of data. The gap is not a clash—FXS is simply less studied.
Why it matters
You now know the FXS playbook has only 31 small studies. Treat every claim with caution. Start with low-risk tactics like visual schedules or brief differential reinforcement. Track data weekly. Share your graphs so the field can grow faster.
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02At a glance
03Original abstract
Fragile X syndrome (FXS) is associated with a wide range of cognitive, emotional, and behavioral difficulties. Although there is considerable research on the behavioral phenotype of FXS, few empirical studies of behavioral interventions with this population have been identified. Through a hand search of 34 behavioral journals, we examined the evidence base for behavioral interventions with individuals with FXS and in light of the current state of knowledge regarding the FXS behavioral phenotype. Systematic review procedures were used to identify behavioral intervention studies that included at least one participant with FXS, extract and summarize the data on several relevant dimensions, and rate the methodological quality of the studies. Results revealed 31 intervention studies with a small number of participants with FXS. Overall, results suggest a behavioral approach to intervention with individuals with FXS shows promise. Future research focused on individuals with FXS will be necessary to continue to examine differences in response to intervention and interventions that specifically address phenotypic characteristics.
Research in developmental disabilities, 2015 · doi:10.1016/j.ridd.2014.12.011