How Dark Triad Faces Fool Us

The Dark Triad personality traits are narcissism, psychopathy, and Machiavellianism. Individuals high in these traits tend to overvalue themselves, devalue others, and often hold beliefs that justify manipulative or harmful behavior. For such individuals, personal gain—whether it be status, happiness, confidence, or a sense of empowerment—often comes at the expense of others. These costs may include physical harm, but more commonly involve spreading rumors, cheating, psychological manipulation, and other forms of interpersonal exploitation.

One reason individuals high in Dark Triad traits are effective at harming others is their ability to make a strong first impression and quickly establish rapport. For instance, narcissists tend to be “liked more at first sight because of their flashy and neat clothing, their charming facial expressions, their self-assured body movements, and their humorous verbal expressions” (Back et al., 2010).

In this post, I discuss a recent study published in Personality and Individual Differences, which sheds more light on how people high in Dark Triad traits are able to gain others’ trust. Specifically, it appears that they gain trust through their perceived physical attractiveness and distinct facial features.

The Investigation

In a series of studies, Zhang and colleagues asked participants to complete various computer-based tasks, including rating facial images and participating in trust games involving monetary decisions.

Study 1 involved 156 Chinese participants (78 males; average age: 19 years). The results showed that during short-term cooperation, faces of individuals with high Dark Triad traits were perceived as more trustworthy than those with low levels of these traits.

Study 2 (149 Chinese adults; 78 males; average age: 19 years), which incorporated behavioral performance measures, reinforced the first study's findings.

Study 3 (204 Chinese adults; 65 males; average age: 19 years) found that the perceived trustworthiness of high-Dark-Triad individuals may stem from their being seen as more attractive.

Study 4 (158 Chinese participants; 65 males; average age: 19 years) showed that in short-term interactions, faces associated with higher Dark Triad traits were seen as more attractive and received more investment. This suggests they were perceived as more trustworthy.

Overall, these findings demonstrate a direct link between perceived Dark Triad traits (based on facial cues) and trust-related behavior. Importantly, these effects remained significant even after controlling for other traits such as dominance, extraversion, and physical attractiveness.

Potential Mechanisms

How can we explain these findings?

Previous research shows that facial attractiveness is a social advantage that often leads to more self-serving behavior. So it is not surprising that people high in both attractiveness and Dark Triad traits seem to benefit more in short-term cooperative settings.

But what about the fact that selfish behavior may also increase the risk of rejection? Perhaps facial beauty helps offset that risk because attractive faces are commonly associated with positive traits such as competence, health, friendliness, helpfulness, and popularity.

Takeaway

People with high levels of Dark Triad traits (i.e., narcissism, psychopathy, and Machiavellianism) are perceived as more attractive and, consequently, more trustworthy.

Furthermore, “even when controlling for perceived traits such as attractiveness, dominance, and extraversion, faces of individuals with high Dark Triad traits continue to evoke increased trustworthiness perceptions and trust behavior from others,” note the authors of the study reviewed.

This highlights the “direct impact of their facial features on interpersonal trust, beyond the effects of facial attractiveness.” In other words, “Dark Triad traits are not merely psychological constructs but may also exhibit their own distinctive facial characteristics,” according to the study.

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This finding aligns with previous research showing that Dark Triad traits can be perceived from facial features and, in some cases, accurately predicted.

What are these facial features? Narcissistic faces, for instance, are more likely to have distinct eyebrows (e.g., thick, dense, well-groomed brows).

But what other facial cues might distinguish narcissists, psychopaths, or Machiavellians? These are questions for future research.

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