Avoids or does not keep eye contact

Does not respond to name by 9 months of age

 Does not show facial expressions like happy, sad, angry, and surprised by 9 months of age

Does not play simple interactive games like pat-a-cake by 12 months of age

Does not share interests with others by 15 months of age

 Does not pretend to be something else, like a teacher or superhero, during play by 48 months of age

 Does not notice other children and join them in play by 36 months of age

Repeats words or phrases over and over (called echolalia)

– Delayed language skills – Delayed movement skills – Delayed cognitive or learning skills