As with all autism spectrum disorders, those with Asperger's have difficulties in social functioning and various communication problems. They often lack the ability to understand nonverbal signals and are poor at deciphering body language. They might fail to develop peer relationships and may be singled out by other kids as "weird" or strange. Because they lack the ability to understand the perspective of others, they often do not return social feelings or share in the happiness or distress of others.
People with Asperger's often function best with rigid routines and rituals. They are often intensely preoccupied with a narrow area of interest, sometimes to the point of obsessiveness. And like those with full-blown autism, they engage in repetitive behaviors like finger twisting and even self-injurious practices.