MCAT Practice · Reasoning about the Design & Execution of Research
MCAT Question: A research study aims to investigate the impact of a…
hard
A research study aims to investigate the impact of a new teaching method on student performance in introductory physics courses. The researchers randomly assign students to either the experimental group, which receives instruction using the new method, or the control group, which receives traditional instruction. At the end of the semester, the researchers compare the exam scores of the two groups to determine if there is a significant difference. Which of the following threats to internal validity is the study most susceptible to?
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