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Compulsive persistence at meaninglessactivities (called stereotypical or
perseverative behavior)
Increased obsessive compulsive behavior (e.g., repeating chores endlessly
and ineffectively)
Mental rigidity (called cognitive perseveration)
Inflexible thinking
Overly narrow or excessive focusing
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Socially withdrawn and isolated
General dampened social behaviour
Reduced communicating or socializing
Decreased responsiveness to parents and other children
Increased solitary play and diminished overall play
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Compliant in structured environments; socially inhibited, passive and submissive
Sombre, subdued, apathetic, lethargic, drowsy, dopey, dazed, and tired
Bland , emotionally flat, humorless, not smiling, depressed, and sad with
frequent crying
Lacking in initiative or spontaneity, curiosity, surprise or pleasure
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