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The lack of demonstrated empathy is possibly the most dysfunctional aspect of Asperger syndrome. Individuals with AS experience difficulties in basic elements of social interaction, which may include a failure to develop friendships or enjoy spontaneous interests or achievements with others, a lack of social or emotional reciprocity, and impaired nonverbal behaviors such as eye contact, facial expression, posture, and gesture.

Unlike those with autism, people with AS are not usually withdrawn around others; they approach others, even if awkwardly, for example by engaging in a one-sided, long-winded speech about a favorite topic while being oblivious to the listener's feelings or reactions, such as signs of boredom or haste to leave. This social awkwardness has been called "active but odd". This failure to react appropriately to social interaction may appear as disregard for other people's feelings, and may come across as insensitive. The cognitive ability of children with AS often lets them articulate social norms in a laboratory context, where they may be able to show a theoretical understanding of other people’s emotions; however, they typically have difficulty acting on this knowledge in fluid, real-life situations. People with AS may analyze and distill their observation of social interaction into rigid behavioral guidelines and apply these rules in awkward ways—such as forced eye contact—resulting in demeanor that appears rigid or socially naïve. Childhood desires for companionship can be numbed through a history of failed social encounters.

The hypothesis that individuals with AS are predisposed to violent or criminal behavior has been investigated and found to be unsupported by data. More evidence suggests children with AS are victims rather than victimizers.
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