How would an adhd child behave with asperger syndrome?

Observable : Behaviors depend on whether he has hyperactivity/impulsivity with his inattention. Inattention, distractibility, being "off-task" often, & forgetfulness impact his academics. Hyperactivity/impulsivity contribute to disruptive behavior.Since the AS already causes non-compliance & seemingly oppositional behaviors, proper diagnosis & treatment of ADHD (in 40-70% of kids with ASD) is vital.

Like you'd expect: The combination of asperger's + adhd is very common. Although individual variations are expected, these children have features of both aspy &adhd. Initially, the prominent feature is often hyperactivity. Because the hyper kids appear to interact with others, the detachment & lack of effective social connectiivity, may not be well appreciated. As they get older, social issues become more apparent.

A technical point: adhd symptoms really should be understood to be part and parcel of aspergers. In DSM, it is incorrect to make a second diagnosis of adhd if the child is already on the autism spectrum. Unless the child is so severely adhd that limits function or puts them at risk e.g. climbing so much or running that they injure themselves multiple times per week.