If your two or three year old has a few of these behaviors, a screening may be in order.
1) Has language delays
2) Resists turning to her name
3) Struggles with eye contact
4) Fails to respond to a word such as cookie when this thing is out of sight
5) Does some things over and over like opening and closing doors
6) Flaps her hands
7) Stares at things
8) Refrains from pointing to interesting sights
9) Seems happiest when alone
10) Uses you (or you hand) as a tool to get things