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A researcher finds a high correlation between scores on her test of friendliness and the number of people at their workplace who consider them nice to work with. Specifically, those who score high on the test tend to have many coworkers who consider them nice to work with, while those who score lower on the test tend to have fewer coworkers who consider them nice to work with. Based on that, it sounds like her test has good...
a. concurrent validity
b. predictive validity
c. content validity
d. face validity