According to the Bayley mental scale,a _____ infant should be able to vocalize pleasure and displeasure,persistently search for objects that are just out of immediate reach,and approach a mirror that is placed in front of the infant by the examiner.
A)two-month-old
B)six-month-old
C)four-month-old
D)one-month-old

Question

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A six-month-old infant is expected to vocalize pleasure and displeasure, search for objects, and show interest in a mirror according to the Bayley mental scale.

According to the Bayley Mental Scale,a _____ Infant Should Be