Is he just defiant, or is there something else going on? He refuses to comply, and he seems to want to manipulate me.

Children with and without Fragile X syndrome learn to maneuver in their environments in order to survive and thrive. In order to discern whether a behavior is oppositional, or merely a reaction to anxiety, pay attention to your reaction. If you provide social attention (Everyone’s looking at us. What do you want?), emotional attention (What’s wrong? Why are you crying?) or negative attention (Stop that. You won’t get ice cream if you keep yelling), you are most likely reinforcing a behavior that will persist.

Oppositional or Physiological?

I’ve talked a lot about the need to break behavioral chains by changing the habituated responses of caregivers. This strategy can be an effective way to change a behavioral outcome. Change your response and see if the child’s behavior changes.

If it does, then the defiance you experience is most likely oppositional because your reaction affects the behavior.

On the other hand, if the behavior continues to escalate, even after dutifully changing your reaction, the child is most likely reacting to their physiological system. A number of researchers have noted that children with Fragile X syndrome have higher levels of physiological arousal in stressful situations.

Generally, oppositional behavior in children with Fragile X syndrome escalates when the stressful event persists. If the child reacts to stress, the defiance will increase as the stress increases. If the stressful condition is modified, the reaction changes because it is no longer necessary for the child to react to the stress, proving that the behavior is a reaction to the anxiety. If the behavior occurs randomly and in isolation, it most likely is not a reaction to stress, and therefore not anxiety-driven.


Sometimes it is a challenge to eliminate the condition that causes the child to become anxious and oppositional. Perhaps a novel experience, such as going to a new school, joining a club, or attending a youth group, elicits an initial reaction to avoid the experience. In these situations, it’s important to encourage the child to increase their tolerance and experience the new situation.

This can be accomplished by providing desensitization through a gradual process: First, expose the child to the novel experience with a set end-time. As they become comfortable, lengthen the time you expect them to tolerate the experience. It is important to be concrete and exact with the desensitization process. Consistency helps the child trust this process. Knowing that there is a specific, predictable ending allows the child to relax and successfully participate.

Timers, pagers, and token boards can be used to provide a tangible reminder of how much longer the experience will last. A token board is a version of a token economy but can also be used to signal the completion of a task. The board becomes a motivational tool to provide tangible evidence of progress toward a goal. This tangible evidence is in and of itself reassuring. Providing verbal reminders of an abstract end-time (10 more minutes) is not helpful. When the child is stressed, 10 minutes may as well be an eternity.

The token board can also provide a distraction when a child’s anxiety becomes overwhelming. As they pay attention to the tokens being moved, they are distracted from the anxiety-provoking event. The tokens can be moved across the board to provide a visual count of how much time has passed and what remains. Customizing the board by using pictures and tokens that reflect special interests provides familiarity, which is comforting.

In summary, remember that children with Fragile X syndrome often fear their own anxiety and become even more upset during an emotional meltdown. This anxiety impacts their ability to function in the mainstream and access their environments.

If we provide them with a way to communicate distress without acting out, we can help release them from feelings of guilt and embarrassment associated with a behavioral reaction. This kind of behavioral support helps the child to gain control of and ultimately manage their own behavior.

Cohen, I.L. (1995), A theoretical analysis of the role of hyperarousal in the learning and behavior of fragile X males. Ment. Retard. Dev. Disabil. Res. Rev., 1: 286-291.

Miller, L., McIntosh, D., McGrath, J., Shyu, V., Lampe, M., Taylor, A., Tassone, F., Neitzel, K., Stackhouse, T. and Hagerman, R. (1999), Electrodermal responses to sensory stimuli in individuals with fragile X syndrome: A preliminary report. Am. J. Med. Genet., 83: 268-279.<268::AID-AJMG7>3.0.CO;2-K

Dr. Marcia Braden

Marcia Braden, PhD, PC
Dr. Braden is a licensed psychologist with a clinical practice specializing in children and adolescents, and serves on the NFXF Scientific and Clinical Advisory Committee and the HillSprings Learning Center Advisory Committee. She is also a contributing author of Fragile X Syndrome; Diagnosis, Treatment, and Research, compiled and edited by Randi and Paul Hagerman, Children with Fragile X Syndrome: A Parent’s Guide, edited by Jayne Dixon Weber, and author of Fragile: Handle With Care: More About Fragile X Syndrome.