One difficulty associated with family studies is that
A) they do not indicate whether symptoms “run in families.”
B) it is not possible to separate the influence of genetics from that of the environment.
C) the drop-out rate for family members tends to be high.
D) it is difficult to determine the contribution of dominant versus recessive genes in family members.
Answer: B
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Scarr and Weinberg found that ________ by the time of late adolescence
a. there was no difference between black and white adoptees' IQ scores b. White adoptees' IQ scores were higher than Black children's c. Black adoptees' IQ scores were higher than White children's d. White adoptees' IQ scores improved while Black adoptees' scores plummeted e. Black and White adoptees' IQ scores decreased
Based on the studies conducted by Nolan and colleagues (2008) and Goldstein and colleagues (2008), which approach seems to be most effective at motivating people to behave in ways that are more environmentally friendly?
a. operant conditioning b. informational social influence c. cognitive dissonance d. guilt and fear appeals