Two-Wave Stability of Grandiose and Vulnerable Narcissism During Adolescence

Literature suggests that narcissistic traits may affect socio-affective development from early adolescence. Two interrelated narcissistic domains have been identified, i.e., narcissistic grandiosity (NG) and narcissistic vulnerability (NV). This study aims to prospectively assess NG and NV during adolescence and to investigate the mediating role of empathy on the stability of narcissistic traits. One-hundred fifty-six adolescents (47.5% females) participated in a longitudinal prospective study. NG, NV, and empathy were assessed at baseline and 24-month follow-up. Compared with NG traits, NV showed a mean-level increasing pattern, albeit with a small effect size. Different empathy domains mediated the developmental trajectories of NG and NV. Specifically, the "fantasy" empathy domain partially mediated the stability of NG, whereas the "personal distress" domain partially mediated the mild increase of NV. The findings suggest that grandiose fantasies and negative activation to others' distress are crucial factors in shaping developmental trajectories of narcissistic traits during adolescence.