An analysis of challenging behavior, comorbid psychopathology, and Attention-Deficit/Hyperactivity Disorder in Fragile X Syndrome.

Newman et al. (2015) sent surveys to families and teachers. They asked about challenging behavior, ADHD signs, and autism traits in people with Fragile X.

No treatment was given. The team just looked at how the problems overlapped.

Kids who also had autism showed more hitting, kicking, and yelling. Boys were far more likely to have hyperactive and inattentive symptoms than girls.

The study tells us what to watch for, not how to fix it.

Older work saw the same link. Olsson et al. (2001) showed that boys with FXS plus autism learn new skills more slowly. Casey et al. (2009) added that even mild autism signs in girls predict lower scores over time.

Hardiman et al. (2018) later pooled many studies and confirmed that boys with FXS show more self-injury and aggression than girls. The new survey matches that picture.

Frantz et al. (2019) moved the finding into schools. Students who had both FXS and autism spent fewer hours in regular classrooms. Isabel’s numbers help explain why: more challenging behavior means more support is needed.

When you assess a client with Fragile X, screen for autism right away. If autism is present, plan for stronger behavior support and smaller class ratios. Also watch boys for hyperactivity and girls for subtler attention issues. These quick checks guide your treatment plan before problem behavior escalates.