“Narcissism and Self-Insight: A Review and Meta-Analysis of Narcissists’ Self-Enhancement Tendencies”, 2015-11-04 (; similar):
The current article reviews the narcissism–self-enhancement literature using a multilevel meta-analytic technique. Specifically, we focus on self-insight self-enhancement (ie. whether narcissists perceive themselves more positively than they are perceived by others); thus, we only include studies that compare narcissists’ self-reports to observer reports or objective measures.
Results from 171 correlations reported in 36 empirical studies (n = 6,423) revealed that the narcissism–self-enhancement relationship corrected for unreliability in narcissism was 0.21 (95% confidence interval [CI] = [0.17, 0.25]), and that narcissists tend to self-enhance their agentic characteristics more than their communal characteristics.
The average corrected relationship between narcissism and self-enhancement for agentic characteristics was 0.29 (95% CI = [0.25, 0.33]), whereas for communal characteristics it was 0.05 (95% CI = [−0.01, 0.10]).
In addition, we individually summarized narcissists’ self-enhancement for 10 different constructs (ie. the Big Five, task performance, intelligence, leadership, attractiveness, and likeability).