The contrast avoidance model suggests that individuals with generalized anxiety disorder (GAD) use worry to sustain negative emotionality and thus avoid a sharp increase in negative emotion. Maintenance of negative mood increases the probability of subsequent decreased negative and increased positive affect (positive emotional contrast
PEC) when worrisome outcomes are better than expected. However, occurrence of PECs via increased positive affect and its application to rumination are unclear. Using a momentary assessment design, we examined effects of worry/rumination on PECs associated with relief and positive events. Participants with GAD and/or major depressive disorder (MDD
N = 76), or without psychopathology (N = 85) rated the occurrence of relief and positive events, emotions, and repetitive thought 8x/day for 8 days. Higher vs. lower worry and rumination were associated with greater decreased anxiety and sadness, and greater increased happiness pre-to-post positive and relief events. Greater GAD and MDD symptoms predicted ongoing higher ratings on intentionally thinking pessimistically to be pleasantly surprised if something good happened. Results suggest that worry/rumination led to enhanced PECs via decreased negative and increased positive affect pre-to-post positive and relief events. Individuals with higher GAD and depression symptoms reported intentionally using worry/rumination to increase PECs in daily life.