Seasonal affective disorder (SAD) is a form of severe recurrent depression that occurs annually in the fall and winter seasons, accounting for 10-20% of cases of recurrent depression. Bright light therapy has previously been shown to be the most effective treatment. In the management of SAD, the challenge is preventing the recurrent episodes in subsequent years.
University of Vermont psychologist Kelly Rohan has presented the first published research study of the long-term effects of...
