Shannon conducts an experiment to test her hypothesis that longer arguments cause couples to become angrier at each other. She randomly assigns couples to argue for either ten minutes or twenty minutes. After her assistant Ken runs the study, Ken tells Shannon that he allowed the couples who were really fighting hard to keep arguing longer than Shannon had originally stated. Shannon cringes, for she knows that the __________ of her study is very low.

Question

Quizplus · Accepted Answer

The internal validity of the study is compromised because Ken did not follow Shannon's instructions, which may have affected the results of the study. The other options are not relevant to this specific issue.

Shannon Conducts an Experiment to Test Her Hypothesis That Longer