Which statement best describes Kaufman's (2001) findings on the pattern of IQ change from young adulthood though old age generated by cross-sectional studies?
a. IQ scores peak in young adulthood (age 20-30) and decline steadily through middle age (40-50) and old age (80-90).
b. IQ scores rise gradually until middle age (age 40-50) then decline slowly until old age (around 80) when the decline accelerates.
c. IQ scores remain fairly constant across the lifespan.
d. IQ scores increase gradually between young adulthood (age 20-30) and old age (80-90).
Question 2
Heidi and Spencer are nearing their first wedding anniversary. It is most likely that
a. they are engaging in less sexual intercourse than when they first married.
b. they are talking a lot more than when they were first married.
c. they are divorced.
d. they spend more time with each other now than ever before.
A fixed action pattern elicited by a sign stimulus.
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