Stereotypical Behaviors:

Insistence on sameness; resistance to change.
Difficulty in expressing needs; using gestures or pointing instead of words.
Repeating words or sentences instead of using normal, responsive language (echolalia).
Laughing, crying, showing distress for reasons not apparent to others.
Aloof behavior, seeking solitude.
Tantrums.
Refusal to cuddle or be cuddled.
Little or no eye contact .
Unresponsiveness to normal teaching methods.
Sustained odd play.
Inappropriate attachments to objects.
Apparent over-sensitivity or under-sensitivity to pain.
No fear of danger.
Uneven gross/fine motor skills.
Not responsive to verbal cues; acts as if deaf although hearing tests in normal range.