The DSM-IV sees Asperger's
syndrome this way:
A. Qualitative impairment in
social interaction, as manifested by at least two of the
following:
1. marked impairments in the use of multiple nonverbal
behaviors such as eye-to-eye gaze, facial expression, body
postures, and gestures to regulate social interaction
2. failure to develop peer relationships appropriate to
developmental level
3. a lack of spontaneous seeking to share enjoyment,
interests, or achievements with other people (e.g. by a lack
of showing, bringing, or pointing out objects of interest to
other people)
4. lack of social or emotional reciprocity
B. Restricted repetitive and stereotyped patterns of
behavior, interests, and activities, as manifested by at
least one of the following:
1. encompassing preoccupation with one or more stereotyped
and restricted patterns of interest that is abnormal either
in intensity or focus
2. apparently inflexible adherence to specific,
nonfunctional routines or rituals
3. stereotyped and repetitive motor mannerisms (e.g., hand
or finger flapping or twisting, or complex whole-body
movements)
4. persistent preoccupation with parts of objects
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