Does not cry when hungry or uncomfortable
Does not notice or respond to loud sounds
Does not make eye contact or smile at caregiver
Does not respond to sounds or voices
Does not make any vowel sounds
Avoids eye contact
Does not smile or laugh
Is not interested in interacting with others
Does not maintain eye contact during playful interaction
Unresponsive to sounds or voices
Does not babble
Does not respond to own name
Does not turn when someone calls their name
Shows no recognition of familiar words, such as “mama” “dada” “doggy”
Doesn’t babble
Doesn’t hold eye contact
Doesn’t respond when name is called
Doesn’t make any attempts to communicate