Comprehensive reviews of the research literature regarding treatment of alcoholism and drug abuse tell us that
a. most people in treatment show long-term improvement.
b. many people improve for a while, but relapse is common.
c. success rates are higher for alcoholism than for drug abuse.
d. success rates are higher for drug abuse than for alcoholism.
Answer: b.
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According to research on preschoolers' interest in babies,
a. parents' ratings of their preschoolers' interest are not correlated with the ratings provided by other observers, so we cannot draw conclusions about this topic. b. there are no gender differences reported for preschoolers. c. parents who accept gentle behaviors in their sons typically have sons who are interested in babies. d. preschool boys have such strong stereotypes about masculinity that they consistently avoid interactions with babies.
Which statement about dizygotic twins is MOST accurate?
a. They are more common among African Americans than any other ethnic or racial group. b. They are more common among Asian Americans. c. They are more common among European Americans. d. They occur with equal frequency among all ethnic and racial groups.