Vocalizes more, cries less6
Vocalizes spontaneously to self or toys14
Different cries for different wants6
Produces chains of sound in throat, less frequently with tip of tongue and lips (i.e. da-da-da, ga-ga-ga, ba-ba-ba)6
Utters vowel sounds (ee, ay, ey, ah, ooh) and some consonant sounds (d, b, l, m) according to opening mouth14
Watches mouths and experiments with sounds after hearing others14
Tries to imitate inflection14
Responds to own name16,14
Prone on extended arms; face side weight shift; responds to own name; game playing and imitation.
Watches mouths and experiments with sounds after hearing others