A team of researchers wants to test the hypothesis that drinking wine makes people like jazz more. They randomly assign college students who are 21 or over to one room in which they will drink wine and listen to jazz or to another room in which they will drink water and listen to jazz. It happens that the “wine room” has a big window with nice scenery outside, whereas the “water room” is windowless, dark, and dingy. The most serious flaw in this experiment is that it a. is low in external validity. b. is low in internal validity. c.did not randomly select the participants from all college students in the country. d. is low in psychological realism

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