Subsyndromal unipolar and bipolar disorders: comparisons on positive and negative affect

The authors examined the mood patterns of young adults with cyclothymia, intermittent depression, or no affective disorder in a nonclinical population. In a conceptual replication and extension of R. A. Depue et al. (1981, Study 5), participants completed a trait measure of mood and then completed daily mood ratings for 28 days. Individuals in the intermittent depression and cyclothymia groups were characterized by high levels of negative affect on trait and daily ratings. Both groups were also characterized by high variability of negative affect across days. Individuals with cyclothymia reported higher levels of trait and daily positive affect than individuals with intermittent depression and also exhibited high between-day variability on positive affect. Similarities and differences with R. A. Depue et al. (1981) are described and the results are discussed in terms of the common and differentiating features of the subsyndromal affective disorders.