Joachim Waterschoot

The essential role of the psychological needs for autonomy, competence, and relatedness in well‐being has been demonstrated convincingly. Yet whether their fulfillment also serves as a source of resilience in the face of adversity has received limited attention. A longitudinal sample of Belgian citizens ( N = 1869; M age = 56.23, 68% female) completed an online questionnaire on 13 occasions between April 2020 and April 2022 during the COVID‐19 crisis. Multilevel analyses showed that need fulfillment, both at the between‐ and within‐person level, related negatively to concerns, even after controlling for exposure to personal risks. Further, the association between concerns and changes in symptoms of depression and anxiety was dampened when people reported higher need fulfillment compared with others (i.e. between‐person level) or when they reported periodically more need fulfillment than usual (i.e. within‐person level). This moderation effect occurred on top of the systematic negative main effect of need fulfillment on symptoms of anxiety and depression. Psychological need fulfillment serves as a resilience factor (a) by reducing concerns in the face of adverse events (i.e. an appraisal effect) and (b) by mobilizing resources that help individuals to deal better with concerns (i.e. a coping effect). Theoretical and practical implications of the resilience effect of need fulfillment are discussed.