Personality Traits and Narrative Identity: Changes in Mid-Adolescence to Emerging Adulthood in Relation to Well-Being

Limited research addresses personality shifts from mid-adolescence to emerging adulthood, alongside well-being. This study analysed Big Five trait and narrative identity change (thematic coherence, causal coherence, resolution valence in turning point narratives) across 111 individuals (46.8% female) aged 15-16 who were reassessed at age 21. Neuroticism, conscientiousness, and extraversion decreased with age; thematic coherence and causal coherence increased. Traits and narrative identity were largely distinct dimensions of personality at both ages. Controlling for traits, narrative identity (negative resolution valence) in mid-adolescence uniquely predicted well-being (higher depression and lower self-esteem) in emerging adulthood. Findings suggest distinct trait and narrative identity trajectories in conjunction with youth well-being.