Volume 26 Num. 3 - October 2026
Gene-Environment Interplay in Narcissism: A Critical Analysis of Behavioral Genetics and Neuroscience
Volume 26 Num. 3 - October 2026 - Pages 361-370
Authors:
Havva Çobanoğulları , Yakup Cem Yababa , Fisun Şah , Behich Koyutürk , Mahmut Çerkez Ergören
havva.cobanogullari@emu.edu.tr
Abstract:
Narcissism is most appropriately conceptualized not as a fixed biological condition, but as a multidimensional pattern of self-regulation, interpersonal functioning, and context-sensitive self-evaluation. This theoretical study critically re-examines the genetic, epigenetic, and neurobiological literature on narcissism. Rather than treating genetic and environmental factors as independent or additive causes, the paper argues that existing findings are more adequately interpreted as evidence of differential sensitivity, developmental plasticity, and socially organized behavioral regulation. Twin and family studies indicate moderate heritability, yet the magnitude and interpretation of these estimates vary across instruments, narcissistic subtypes, populations, and developmental contexts. Molecular genetic findings remain preliminary, candidate-gene approaches have yielded limited reproducibility, and available genome-wide evidence does not support a simple genetic explanation of complex personality phenotypes. Epigenetic and neurobiological findings are therefore most informative when interpreted as mechanisms through which developmental experience may become biologically embedded over time. The study proposes a model in which biological sensitivity, learning history, social contingencies, cultural reinforcement, and interpersonal feedback jointly organize grandiose and vulnerable narcissistic patterns. This framework preserves the relevance of biological evidence while avoiding genetic determinism and provides a stronger conceptual basis for longitudinal, multimethod, and ethically responsible research.
How to cite this paper:
Çobanoğulları H, Yababa YC, Şah F, Koyutürk B, & Ergören MÇ (2026). Gene-Environment Interplay in Narcissism: A Critical Analysis of Behavioral Genetics and Neuroscience. International Journal of Psychology & Psychological Therapy, 26, 3, 361-370.
Key words:
Narcissism, behavioral genetics, gene-environment interplay, epigenetics, neurobiology, personality development
Full Article
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