A systematic review of volitional personality change research.

Personality traits predict a broad range of life outcomes, including relationship success, educational attainment, and health. As many people have the desire to change some aspects of their personality, volitional personality change (VPC) - self-directed trait changes in the direction of personal change goals - has recently gained increasing attention. This preregistered review aimed to provide an integrative overview of the emerging literature on VPC ( https://osf.io/ns79m ). Based on a systematic literature search on PsycINFO (October 1, 2024), we identified 30 empirical, longitudinal studies on VPC (N = 7719). We summarized the findings from these studies in a narrative integration and using meta-analytic tools and distinguished two research strands in the VPC literature: studies examining VPC without interventions and studies examining intervention-induced VPC. Simply having a goal to change one's personality was only weakly related to actual personality changes. However, VPC interventions were successful in promoting desired personality changes (d = 0.22, 95% CI = [0.005, 0.433], 7 studies, 26 effect sizes). These personality changes seemed to last or even increase during follow-up periods (d = 0.37, 95% CI = [0.140, 0.591], 4 studies, 17 effect sizes) and were associated with changes in other variables such as well-being. Although the available evidence on VPC is still limited, the initial results on VPC are promising. Future research is needed to draw definitive conclusions on the generalizability, mechanisms, and practical implications of VPC. The authors received no funding to conduct this review.