“Thank you for submitting the results of your study,” Ms. Lestari tells her psychology students. “I had two other classes conduct the same experiment. Their results were the opposite of yours.” Ms. Lestari is questioning the study’s what?

Reliability is the consistency of a study’s results when the same experiment is repeated. Since the two other classes conducted the same experiment but found opposite results, Ms. Lestari is questioning whether the results are reliable. Ethics concerns whether research is conducted responsibly, not whether repeated results agree.

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