0 - 6 Months

  • Startles to loud sounds
  • Responds to voice and sound
  • Turns head toward sound source
  • Watches speaker’s face when spoken to
  • Discriminates between strangers and familiar people
  • Stops crying when spoken to
  • Varies responses to different family members
  • Smiles when spoken to
  • Has a social smile
  • Uses babbling for gaining attention and expressing demand
  • Establishes eye contact 

6 - 12 Months

  • Responds to “no”
  • Responds to name and pats image of self in mirror  
  • Tries to “talk” to listener
  • Coos and squeals for attention
  • Laughs when playing with objects
  • Tries to communicate by actions and gestures
  • Smiles at self in mirror
  • Plays pat-a-cake and peek-a-boo games
  • Copies simple actions of others
  • Shouts to attract attention 
  • Points to learn new vocabulary

1 - 2 years

  • Follows simple directions, especially with a gestural cue
  • Waves bye-bye
  • Indicates wet pants
  • Repeats actions that made someone laugh
  • Engages in parallel play
  • Pairs gestures with words to make wants known (e.g., “more” and “up”)
  • Imitates adult behaviors in play
  • Refers to self by name
  • Exhibits verbal turn-taking
  • Protests by vocalizing “no”
  • Engages in simple pretend play, such as talking on a telephone
  • Says “bye” and other social words, such as “hi,” “thank you,” and “please”
  • Talks to self during play
  • Practices intonation, sometimes imitating an adult 

2 - 3 years

  • Watches other children and briefly joins in their play
  • Participates in associative play
  • Requests permission for items or activities
  • Begins to use language for fantasies, jokes, and teasing
  • Makes conversational repairs when listener does not understand 
  • Begins to play house
  • Participates in simple group activities
  • Defends own possessions
  • Carries on “conversation” with self and dolls
  • Engages in simple, make-believe activities
  • Begins to control behavior verbally rather than just physically
  • Looks for missing toys
  • Helps put things away
  • Engages in longer dialogues
  • Holds up fingers to tell age

3 - 4 years

  • Follows two-step related directions without cues
  • Takes turns and plays cooperatively
  • Relates personal experiences through verbalization
  • Separates from primary caregiver easily
  • Frequently practices conversation skills by talking to self
  • Begins dramatic play, acting out whole scenes
  • Shows frustration if not understood
  • Expresses ideas and feelings 

4 - 5 years

  • Follows three-step directions without cues
  • Uses direct requests with justification (e.g., “Stop that. You’re hurting me.”)  
  • Uses words to invite others to play
  • Uses language to resolve disputes with peers
  • Plays competitive exercise games
  • Has good control of the elements of conversation
  • Speaks of imaginary conditions, such as “What if ...” or “I hope ...” 

5 - 6 years

  • Begins to use word plays
  • Uses threats and promises
  • Asks meanings of words
  • Likes to complete projects
  • Makes purchases at stores
  • Asks questions for information
  • Chooses own friends
  • Takes more care in communicating with unfamiliar people
  • Engages in cooperative play, such as making group decisions, assigning roles, and playing fairly
  • Announces topic shifts