can turn head from side to side when prone; lifts head momentarily from bed
actively holds rattle but will not reach for it
vocalizes, distinct from crying
locates sound by turning head to side and looking in same direction
squeals aloud to show pleasure
able to grasp objects voluntarily
sits, leaning forward on both hands
sits steadily unsupported
begins to imitate sounds
babbling resembles 1-syllable utterances-- ma, mu, da, di, hi
briefly searches for dropped object (object permanence beginning)
increasing fear of strangers; shows signs of fretfulness when parent disappears
produces vowel sounds and chained syllables-- baba, dada, kaka
cruises or walks holding onto furniture or with both hands held
birth length increased by 50%
searches for object even if it has not been hidden, but searches only where object was last seen
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