According to the article Zipping Up the Genes about twins reared apart, which group of people was used

as a control to be sure that the findings of the study were not only the result of having been separated from
family

(a) a large class of introductory psychology students
(b) the researchers in the lab where the twin studies were conducted
(c) the spouses of the twins being studied
(d) a sample of people located by random dialing of phone numbers

C

Psychology

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We attribute our own shortcomings and unacceptable feelings to others when we use

a. reaction formation. b. denial. c. projection. d. sublimation.

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Low correlations

a. imply that the two variables are causally related. b. are found only with Pearson coefficients. c. may be produced by a restricted range of one of the variables. d. are seldom observed in psychological research.

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