S.A.D. Data Poster
Seasonal Affective Disorder (SAD) is a type of depression that's related to changes in the seasons, and usually begins and ends at the same time of year. It is thought to be caused by lack of light. For many people, the symptoms start in early fall and continue into the winter months. However, SAD is more than just the winter blues.
This poster uses data to visually display a study done that tested patients on a scale of how depressed they felt that month, compared to the amount of light they received that day (the photoperiod).
As the blue and purple tube get wider, the photoperiod becomes larger. The pink, wafer like tabs coming from the tube represent the amount of patients who declared they felt depressed during that photoperiod, and are relative in size to one another.