When researchers are interested in predicting some future behavior based on a person's score on some other variable, they should
A. demonstrate that the correlation coefficient of the known and the unknown variables is closer to -1.00.
B. construct a scatterplot in addition to looking at the magnitude of the correlation coefficient.
C. construct several criterion variables.
D. demonstrate that there is a reasonably high correlation between the criterion and predictor variables.
Answer: D
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a. Endorphins b. Mirror neurons c. Certain genes d. All neurons.
Are gender differences more likely caused by nature- or nurture-related factors?
a) Nature. Gender differences overwhelmingly reflect the different evolutionary pressures faced by men and women in the distant past. b) Nature. Gender differences overwhelmingly reflect male and female differences in hormonal influences and brain anatomy. c) Nurture. Gender differences overwhelmingly reflect differences in socialization. d) Both nature and nurture. Gender differences reflect the interplay of evolutionary, biological, and social factors.