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Prevent any of the internal validity threats

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For his senior thesis, Jack was interested in whether viewing alcohol advertising would cause college students to drink more alcohol. He recruited 25 seniors for a week-long study. On Monday and Tuesday, he asked them to log in to a secure website and record how many alcoholic beverages they had consumed the day before. On Wednesday, he invited them to the laboratory, where he showed them a 30-minute TV show interspersed with entertaining advertisements for alcoholic products. Thursday and Friday were the follow-up measures: Students logged in to the secure website and recorded their alcoholic beverage consumption again. Jack found that students reported drinking more after seeing alcohol advertising. He concluded that the advertising caused them to drink more.

QUESTION: Indicate whether you could redesign the study to correct or prevent any of the internal validity threats.

Reference no: EM132393120

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