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After taking a special computerized introductory sociology course, students do twice as well on the posttest as they did on the pretest. The researcher suspects the pretest alerted students to what was to come, however. This threat to internal validity is called
Q3: Psychology's goal of _ is accomplished when
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Q8: Because of the _ phenomenon, any extreme
Q10: When planning any study, the research psychologist
Q19: In a 2x2 design, the following results
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Q71: Consider correlations of +.65 and -.65. How
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Q322: If the United States exports $100 billion