Ben Believes That Standing on His Head for 5 Minutes

Ben believes that standing on his head for 5 minutes first thing every day will help him to be in a good mood all morning. He stands on his head for 5 minutes when he wakes up for3 days in a row. On all three of these mornings he is in a good mood, so he concludes that standing on his head is responsible. Which of the following is a potential confound in Ben's study?

A) the lack of a control condition where Ben does not stand on his head
B) the expectation that standing on his head will put him in a good mood
C) the very small amount of data that he collects (just 3 days' worth)
D) all of the above

Correct Answer:

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