Dark Triad, Depression, Anhedonia and Alexithymia: The Role of Sex Differences

The Dark Triad (Machiavellianism, narcissism, and psychopathy) has been traditionally associated with externalizing behaviors and a lack of empathy. However, emerging evidence suggests that these traits also relate to internal emotional vulnerabilities (such as depression, alexithymia, and anhedonia). This study aimed to examine the association between Dark Triad traits and emotional variabilities (alexithymia and anhedonia) in the general population, with a particular focus on sex differences. A total of 492 French-speaking adults completed a battery of validated self-report measures online, including the SD3fr, BDI-II, TAS-20, and PAS. Comparative and multivariate analyses were conducted separately for males and females. High SD3 scores were associated with greater depression, alexithymia (especially difficulty in identifying feelings), and anhedonia in the overall sample. These associations remained significant after adjusting for depression severity. Sex differences emerged: in females, high Dark Triad traits were strongly linked to emotional dysfunction, while no such associations were observed in males. These findings support the presence of sex-specific emotional correlates of the Dark Triad, particularly in females, where Machiavellianism and psychopathy were linked to emotional distress. Clinical implications are discussed in light of hormonal, sociocultural, and emotional regulation differences.