The moderating role of catastrophizing in day‐to‐day dynamic stress and depressive symptoms

The way individuals handle daily stressors can significantly influence their mental health. Those who struggle with emotion regulation are especially vulnerable to the negative effects of stress. This study explored the role of catastrophizing, a maladaptive emotion regulation strategy, in shaping the relationships between daily stress responses and depressive symptoms. A total of 75 healthy college students participated in the study. We adopted an Ecological Momentary Assessment protocol over 14 consecutive days to capture the day‐to‐day dynamics of stress reactivity and recovery. Our findings indicate that individuals with higher levels of catastrophizing exhibited increased daily stress reactivity and delayed daily stress recovery, consequently raising their likelihood of experiencing amplified depressive symptoms. In contrast, those with lower levels of catastrophizing did not experience the same negative effects of increased daily stress reactivity on their mental health. These results enhance understanding of how real‐life stressors contribute to the development of mental health issues and underscore the importance of adaptive emotion regulation for improved overall health and well‐being.