A professor conducts an experiment using lectures in the first half of the semester and active learning in the second half of the semester. Because he prefers active learning, a threat to his experiment would be

Question

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Experimenter expectancy effects occur when the experimenter's expectations influence the outcome of the study. Since the professor prefers active learning, his expectations might unintentionally affect the results in favor of active learning.

A Professor Conducts an Experiment Using Lectures in the First