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Evaluating the Experiment from the Inside: Internal Validity Jack Just

Question 24

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Evaluating the Experiment from the Inside: Internal Validity Jack just completed a study of the effects of caffeine and rave music on recall.He is excited about finding a significant interaction and says, "This is so cool! I've proved my research hypothesis.Jolt cola with rave music is the way to study." Jack's experiment cannot prove his research hypothesis because his results could be due to


A) confounding.
B) Type 1 error.
C) Type 2 error.
D) confounding and/or Type 1 error.

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