Taken from the DSM-IV-TR (it's a nice sentence that sums it up):
Quote:
In Asperger's Disorder, the social deficits are quite severe and the preoccupations are all-encompassing and interfere with the acquisition of basic skills.
Severe impairment in reciprocal social interaction (from having difficulty in socializing, and hence having few friends, to the complete inability to socialize at all)
All-absorbing narrow interest that one spends an inordinate amount of time on