2006-6-15 2005-10-18 Explaining behavior that is affected by seasonal changes.SAD, Seasonal Affective Disorder by premier Amrican behaviorist. 14144 text/html 1.0 EN SSAD SAD Behavior summer seasonal affective disorder seasonal affective disorder behavioral disorders Sociology psychology management behavioral management fella management anxiety depression snow states northern states summer states bright light therapy Summer Seasonal Affective Disorder text