Reacts to loud sounds with startle reflex.

Is soothed and quieted by soft sounds.

Turns head to you when you speak.

Is awakened by loud voices and sounds.

Smiles in response to voices when spoken to.

Seems to know your voice and quiets down if crying.

Looks or turns toward a new sound.

Responds to "no" and changes in tone of voice.

Imitates his or her own voice.

Enjoys rattles and other toys that make sounds.

Begins to repeat sounds (such as ooh, aah and ba-ba).

Becomes scared by a loud voice or noise.

Responds to his or her own name, telephone ringing, someone's voice, even when not loud.

Knows words for common things (cup, shoe) and sayings ("bye-bye").

Makes babbling sounds, even when alone.

Starts to respond to requests such as "come here."

Looks at things or pictures when someone talks about them.

Plays with own voice, enjoying the sound and feel of it.

Points to or looks at familiar objects or people when asked to do so.

Imitates simple words and sounds; may use a few single words meaningfully.

Enjoys games like peek-a-boo and pat-a-cake.

Follows one-step commands when shown by a gesture.

Follows simple directions, such as "give me the ball" without being shown.

Uses words he or she has learned often.

Uses 2 to 3 word sentences to talk about and ask for things.

Knows 10 to 20 words.

Points to some body parts when asked.

Understands simple "yes-no" questions (Are you hungry?).

Understands simple phrases ("in the cup," "on the table").

Enjoys being read to.

Points to pictures when asked.

Understands "not now" and "no more."

Chooses things by size (big, little).

Follows two-step commands, such as "get your shoes and come here."

Understands many action words (run, jump).