When studying the effects of sunlight on a person's mood, scientists asked one group of patients to remain outside for one hour and a control group to remain inside all day. At the end of the experiment, 75% of the group that had received sunlight had a better mood. What can be concluded from these results?

Question

Quizplus · Accepted Answer

This is an example of a poorly-constructed experiment since it relies on self-reporting. The scientists were not present to ensure that the patients actually stayed outdoors for one hour or that the control group stayed inside all day. The scientists also did not account for other possible variables that could affect their patients' moods.

When Studying the Effects of Sunlight on a Person's Mood