Barrons AP Psychology 7th edition

(Marvins-Underground-K-12) #1

  1. (C) Eli, if developing typically and 6 months old, is probably just beginning to sit up. Infants
    develop in a predictable sequence and a fairly predictable rate: at about one month, most infants
    can lift their head; by 3 months, most can hold their heads steady; by 6 months, most can sit up; by
    9 months, most are beginning to try to stand up while holding on to something; and by a year, most
    infants begin to stand on their own and take a step or two.

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