Abstract
Self-efficacy beliefs in emotion regulation were shown to foster well-being and psychosocial adaptation over time. In this study, we investigated their relationship with daily affect intensity among 199 adolescents aged 15–19. Participants completed the Regulatory Emotional Self-Efficacy Scale measuring perceived capability to manage the experience and expression of negative emotions (SE-NE) and positive emotions (SE-PO). Through Experience Sampling Method, for 1 week they also repeatedly rated their positive affect (happiness and contentment) and negative affect (anger, anxiety, sadness). Multilevel regression models revealed an additive intensifying predictive effect of SE-PO and SE-NE on happiness and contentment, and a single direct negative effect of SE-NE on sadness. Models also highlighted an interactive effect of SE-PO and SE-NE on all negative affect variables, such that only at low SE-PO levels did high SE-NE predict lower negative affect. Findings support the relation between adolescents’ regulatory emotional self-efficacy beliefs and their daily affect intensity, bringing forward suggestions for intervention.