Joint trajectories of adolescent narcissism and self-esteem predict interpersonal features in young adulthood

The joint developmental trajectories of narcissism and self-esteem were examined across ages 13 to 19 in the prediction of interpersonal features at age 20 (indirect aggression, jealousy, hypercompetitiveness, mate value). In 617 individuals (54.5% girls/women; 76.2% White), the five expected groups of interest were found: (1) high increasing narcissism/high stable self-esteem (i.e., grandiose narcissism; 13.1%, n = 81), (2) high increasing narcissism/moderate-to-low decreasing self-esteem (i.e., vulnerable narcissism; 1.1%, n = 7), (3) low decreasing narcissism/high stable self-esteem (9.9%, n = 61), (4) low decreasing narcissism/moderate-to-low decreasing self-esteem (6.5%, n = 40), and (5) moderate stable narcissism/high stable self-esteem (35.2%, n = 217). The grandiose and vulnerable narcissism groups significantly predicted indirect aggression but differed in the other interpersonal features.