Essay
A researcher would like to conduct an experiment to test the effectiveness of a program designed to raise SAT scores. He wishes to obtain a sample of low-scoring high school students, administer the program, and then administer the SAT again. He hypothesizes that SAT scores will be higher after the program than before. Describe at least four different threats to internal validity that are relevant in this study.
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1. Selection bias: If the researcher doe...View Answer
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Correct Answer:
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