Prolonged use of amphetamines has been linked to an increase in violent behavior, but it is not easy to interpret this link because
a. there are many different definitions of violence.
b. people are usually not willing to admit that they have taken amphetamines.
c. the violence could be due to a drug user's lifestyle, not the drug itself.
d. very few people actually engage in prolonged use of amphetamines.
Answer: c.
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Kendra is a member of AmeriCorps. She has spent two years volunteering as a tutor for children and adults in low-income families. According to the research, if Kendra is like most AmeriCorps volunteers, we can predict that she
a. will not be a volunteer in her adult life. b. will continue on to the Peace Corps. c. has significantly gained in all five "life skills areas." d. will not be able to afford to attend college after AmeriCorps.
According to earlier cross-sectional studies of age-related changes in intelligence, scores on which of the following tests would be most likely to decline the LEAST with age?
a. vocabulary b. figural relations c. overall intelligence d. inductive reasoning