Cognitive-behavioral therapy (CBT) is just as effective as light therapy for treating seasonal affective disorder (SAD), according to a study published online in AJP in Advance.

While it is known that many people with SAD respond to light therapy, few studies have examined the effectiveness of other therapies. In the current study, Kelly Rohan, PhD, a professor of psychology at the University of Vermont, and colleagues assigned 177 adults with an episode of major depression recurrent with a seasonal pattern to receive six weeks of CBT (two 90 minute sessions per week) or light therapy (30 minute session each morning).

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