Avoids or does not keep eye contact
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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