A study of diurnal patterns of depressed mood

The study investigated diurnal patterns of depressed mood in a sample of normal subjects. In all, 105 college undergraduates were followed for a period of 10 days, using a self-administered psychological diary. Eighty-four percent of the days in which feelings of depressed mood were reported involved some type of mood swing. The most frequent pattern of mood shift was a pattern of gradually increasing depressed mood, reaching its peak in the evening. Persons who reported days of constant depressed mood reported higher levels of physical symptoms and less pleasure in social interactions than persons who reported only depressed days involving mood swing.

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