A Farewell to the Narcissism Epidemic? A Cross-Temporal Meta-Analysis of Global NPI Scores (1982-2023).

Abstract

Several recent accounts have failed to replicate the so-called Narcissism Epidemic, suggesting potential influences of the Global Financial Crisis (GFC) in 2008 as a reason for narcissism trend reversals. Here, we provide evidence for narcissism test score changes from 1982 to 2023. We investigated self-report data on the Narcissistic Personality Inventory (NPI) from 1105 studies (k = 1621, N = 546,225) using precision-weighted cross-temporal meta-analysis. Data collection years were meaningfully negatively associated with narcissism scores in virtually all analyses (bs: -0.409 to -0.008; partial eta square's: < 0.001 to 0.118; ps: < 0.001 to 0.174), thus indicating cross-temporally decreasing narcissism self-report scores. Examination of regression segments pre- and post-dating the GFC and segmented line regressions indicated mostly stable narcissism scores during the 1980s and 1990s that subsequently showed negative slopes with somewhat differing decreases onsets according to analytical subsets. Here, we provide evidence for negative cross-temporal changes in narcissism from 1982 to 2023 globally, thus contrasting the idea of a Narcissism Epidemic having taken place at any point during the past four decades. Changes appear to generalize across different regions and participant sex, although mean scores were differentiated, yielding higher narcissism values for North American and younger samples.