In the context of effect size, the r2 value is sometimes referred to as the
A. difference between the highest and the lowest scores.
B. range of possible values that is restricted.
C. percent of shared variance between the two variables.
D. magnitude of the correlation coefficient.
Answer: C
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Compared to the results obtained using other research methods, the results from twin study research
A. probably underestimate the role of genetics in personality. B. make a stronger case for the role of genetic influences on personality. C. are less subject to criticisms about underlying assumptions. D. often are not replicated.
The heart is the most susceptible to developing birth defects
during the first two weeks after conception. between the third and sixth weeks after conception. between the eighth and twelfth weeks after conception. during the two months immediately before birth.
Today, what is the status of Freud's stages of psychosexual stages in explaining human development?
a. Few people who study human development adhere to the theory. b. It is the accepted theory of how people's personalities develop. c. There are some arguments regarding the theory, but overall it has met the test of time. d. The first three stages have been very explanatory, but the two last are not.
Women are most often awarded custody of their children because of the belief that they are the best custodians of children, even though we know that women commit infanticide and abuse. Our belief represents
a. an extrinsic motivation. b. a causal theory. c. an external attribution. d. terror management theory.