Structure of Affect in Types of Anxiety and Depression

Although anxiety and depression are treated as separate conditions, the literature concerning their affective functioning is inconclusive. To address this issue, we analyzed types of anxiety (arousal and apprehension) and depression (valence and anhedonic). We hypothesized that the similarities and differences in the structure of affect would be related to the specific structural components and functions (reactive or regulative) of the types. We assessed the valence (negative and positive affect) and content (specific emotions) of affect by the Positive and Negative Affect Schedule - Expanded Form (PANAS-X) in 1,632 participants from a general population. Regression analyses showed that the anxiety and depression types (measured by Anxiety and Depression Questionnaire) can be differentiated by the content of affect, but not its valence: Fear was characteristic for anxiety, especially the arousal anxiety. Valence depression was primarily related to hostility, while anhedonic depression was predicted by sadness, guilt, and lowered joviality. Moreover, as expected, regulative emotions (e.g., joviality) were stronger predictors of the regulative apprehension anxiety and anhedonic depression, while the more reactive fear was more strongly related to the reactive arousal anxiety than to regulative apprehension anxiety. These results confirm that the structure of affect is related to the structure and functions of anxiety and depression types.