What behavioral characteristics are common in autism?

Behavioral characteristics range widely and may include:

  •         persistent preoccupation with or attachment to unusual objects or topics of interest
  •         preoccupation with parts of objects
  •         repetitive motor movements, such as body rocking, spinning, hand flapping or finger flicking
  •         inflexible adherence to routines or rituals
  •         difficulties with transition
  •         hyperactivity and/or impulsivity
  •         aggression, self-injury, and/or tantrums