A) do not experience a significant vocabulary spurt until they enter kindergarten, when
vocabulary increases by 50 to 100 words per week.
B) experience a vocabulary spurt during the toddler years, learning as many as 5 to 10
new words per day.
C) experience a vocabulary spurt between ages 7 and 8, learning between 50 and 100
new words per day.
D) show a steady, continuous increase in rate of word learning throughout the preschool
years, adding as many as nine new words per day.
Marita is an African-American child who was adopted into an economically well-off
white family when she was a baby. Findings from several adoption studies predict that
Marita will
A) have an IQ considerably below that of white children growing up in similar families.
B) attain a mean IQ 20 to 30 points higher than the typical scores of children growing
up in low-income black communities.
C) experience a 20- to 30-point drop in IQ between early childhood and adolescence.
D) remain below the national average in IQ throughout childhood and adolescence.
Some researchers claim that young babies respond in kind to others’ emotions through a
built-in, automatic process of