Delayed speech, no pointing or gestures by 12 months, repeats or echoes sounds, words or phrases, doesn’t speak in two word phrases by 24 months, cannot answer questions by 36 months

Prefers to play alone or needs to direct play, does not respond to name, limited eye contact or social smiles, does not imitate play actions, does not show items or share interests by 24 months

Focused more on parts of a toy or object rather than engaging in functional play (spins wheels, lines up items), significant tantrums (aggression or hitting own head), sensory issues with textures, sounds, or lights, repetitive play actions, flaps hands, walks on toes