In which of the following ways does restricting the range of a variable affect the correlation coefficient?
A. It improves the correlation coefficient.
B. It has no effect on the correlation coefficient.
C. It reduces the magnitude of the correlation coefficient.
D. It changes the direction of the correlation coefficient.
Answer: C
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A. dialectical thinking B. moralistic thinking C. postformal thought D. logical thinking
Which group is the least likely to have difficulty adjusting to late maturation?
A. tenth grade late-maturing girls B. late-maturing boys who are shorter and weigh less than their peers C. late-maturing boys who speak with a high-pitched voice D. seventh grade late-maturing girls
Edwards (1990) found evidence that ______.
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a. encourage persistence. c. give toys for good grades. b. provide stimulating experiences. d. make their children feel lucky.