Why I Believe SAD Is Real

Let’s take a closer look at the study on seasonal affective disorder (SAD). The questions this study raises are two-fold:

•  Were the research methods used appropriate to answer the question?
•  Were the conclusions the researchers made warranted?

Without getting too technical, there are several problems. First, all the researchers could do is see if each of the events were correlated—the Depression Survey, the weather and latitude, and the season of the year. That’s all. Correlation does not mean cause and effect. It’s puzzling that experienced researchers would say there . . .

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