Which of these provides the strongest evidence for a genetic role in personality?
a) correlations between fraternal twins reared apart
b) correlations between identical twins reared apart
c) average scores on extraversion of identical twins reared together
d) average scores on conscientiousness of fraternal twins reared together
B
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What common thread runs through paranoid, schizoid, and schizotypal personality disorders?
a. They are commonly mistaken for schizophrenia. b. They typically follow schizophrenic episodes. c. They sometimes precede the onset of full-blown schizophrenia. d. They are inherited disorders that often lead to dementia.
Grace and George are engaged to be married and are considering taking a pre-marital education program to help their chances of having a successful marriage. Based on the research presented by your authors, what would you advise them?
a. These programs have reduced divorce by 90 to 92% among couples who attended them, so you should sign up immediately! b. These programs have consistent, though modest positive effects on marriages, so go ahead and sign up! c. Don't waste your time. These programs show no positive or negative impact on marriages. d. Avoid these programs at all costs! Research shows that they actually harm marriages rather than helping them.
Alfredo is conducting an experiment on the effects of exercise on concentration. The independent variable is ____ and the dependent variable is ____.
A. subjects; control group B. experimental group; concentration C. exercise; concentration D. concentration; exercise
A meta-analysis of family therapy by Baucom et al. (1998) found that
a. family therapy appears helpful in reducing schizophrenia relapse. b. family therapy appears less effective than individual therapy for obsessive-compulsive disorder. c. both of the above d. neither of the above