Background Theories connecting depression to emotional reactivity (ER) or cognitive reactivity (CR) have not clearly indicated whether ER and CR are between-person or within-person constructs. Most empirical tests of these theories have focused on either between- or within-person operationalizations of these constructs, but not both. Between- and within-person studies address qualitatively different questions and often generate very different results. Consequently, the goals of the current study were to examine the relation of depressive symptoms to both between- and within-person operationalizations of both ER and CR. Methods Participants were 160 undergraduate students who completed daily diary measures (assessing stress, negative emotions, and negative cognitions) and measures of depressive symptoms. Multilevel modeling (MLM) enabled examination of depressive symptoms to the within- and between-person components of ER and CR. Results: Depressive symptoms were positively related to within-person ER and CR but not to between-person operationalizations of ER and CR. Limitations The sample only included college students and only assessed depressive symptoms, not clinical diagnoses of major depression. Conclusions Important implications emerge for theory, practice, and future research. We recommend distinguishing between-person from within-person dimensions of ER and CR in future research.
