Dark Triad Traits and Risky Behaviours: Identifying Risk Profiles from a Person-Centred Approach

Dark Triad personality traits and realistic and symbolic COVID-19 threat: The role of conspiracy mentality

The COVID-19 pandemic has profoundly altered global social dynamics through extensive containment measures. Understanding how individuals perceive the virus, distinguishing between realistic and symbolic threats, and considering the influence of personality traits is essential for effective public health messaging and interventions. This study explores the linkage between personality traits and perceived COVID-19 threats, mediated by conspiracy mentality, across diverse international contexts. Online survey data were collected in June 2021 from 13,645 participants across seven European countries, the US, and Colombia. The study explores how individuals with different Dark Triad traits perceive the threat of COVID-19, and whether conspiracy mentality mediates these perceptions. The findings reveal distinct associations. Machiavellianism and narcissism were linked to lower perceived COVID-19 threat, while psychopathy was associated with greater perceived threat. Additionally, individuals with higher conspiracy mentality endorsed greater perceived threat related to COVID-19. This study highlights the influence of Dark Triad personality traits on how individuals perceive the threats posed by COVID-19, with conspiracy mentality mediating this relationship. Understanding these associations provides valuable insights into psychological factors affecting COVID-19 perception, informing future research and public health strategies.

Dark triad personality traits are associated with decreased grey matter volumes in 'social brain' structures

Introduction

Personality traits and the degree of their prominence determine various aspects of social interactions. Some of the most socially relevant traits constitute the Dark Triad - narcissism, psychopathy, and Machiavellianism - associated with antisocial behaviour, disregard for moral norms, and a tendency to manipulation. Sufficient data point at the existence of Dark Triad 'profiles' distinguished by trait prominence. Currently, neuroimaging studies have mainly concentrated on the neuroanatomy of individual dark traits, while the Dark Triad profile structure has been mostly overlooked.

Methods

We performed a clustering analysis of the Dirty Dozen Dark Triad questionnaire scores of 129 healthy subjects using the k-means method. The variance ratio criterion (VRC) was used to determine the optimal number of clusters for the current data. The two-sample t-test within the framework of voxel-based morphometry (VBM) was performed to test the hypothesised differences in grey matter volume (GMV) for the obtained groups.

Results

Clustering analysis revealed 2 groups of subjects, both with low-to-mid and mid-to-high levels of Dark Triad traits prominence. A further VBM analysis of these groups showed that a higher level of Dark Triad traits may manifest itself in decreased grey matter volumes in the areas related to emotional regulation (the dorsolateral prefrontal cortex, the cingulate cortex), as well as those included in the reward system (the ventral striatum, the orbitofrontal cortex).

Discussion

The obtained results shed light on the neurobiological basis underlying social interactions associated with the Dark Triad and its profiles.

Validity and reliability of the Persian version of the machiavellian personality scale and its association with social adjustment and risky behaviors in Iranian college students

OBJECTIVE

The present study aims to develop and assess the psychometric properties of the Persian version of the Machiavellian Personality Scale (P-MPS), and evaluate its relationship with social adjustment and risky behaviors in Iranian college students.

METHODS

Participants were 500 healthy college students (270 females and 230 males) from medical and non-medical universities in Sanandaj, Iran. They completed the P-MPS, the social adjustment subscale of the Bell Adjustment Inventory, and the Youth Risk Behavior Surveillance System (YRBSS) questionnaire. The factor structure of the P-MPS was evaluated by exploratory factor analysis followed by confirmatory factor analysis (CFA). Cronbach's alpha coefficient was used to examine the internal consistency of the P-MPS and Pearson correlation test was used to investigate the relationship of the P-MPS score with the scores of social adjustment subscale and YRBSS.

RESULTS

The P-MPS showed good content validity (Content validity ratio = 0.73, content validity index = 0.90), construct validity, and internal consistency (α = 0.802). The CFA results supported the four-factor solution of the questionnaire. The total score of P-MPS and its dimensions showed a significant negative relationship with social adjustment (p < 0.05). Moreover, its score was significantly correlated with risky behaviors (p < 0.05).

CONCLUSION

The Persian version of MPS can be used for assessing Machiavellianism in the Iranian population.

Metabolic Syndrome in Affective Disorders: Associations with Dark Triad Personality Traits

Previous research has focused on the relationship between affective disorders (AD) and metabolic syndrome (MetS). Aside from biological and lifestyle factors, personality traits were identified as influencing aspects. In particular, the Dark Triad personality traits (DT; Machiavellianism, narcissism, psychopathy) were connected to both AD and worse somatic health, thus possibly resulting in MetS. This observational study aimed to investigate the associations between DT and anthropometric parameters and differences in the DT traits concerning the presence of MetS in individuals with AD. A total of 112 individuals (females = 59, males = 51, diverse = 2, Mage = 47.5, SDage = 11.5) with AD filled out the Short Dark Triad questionnaire. Body Mass Index (BMI) and MetS criteria, including blood pressure, waist circumference, lipid, and glucose levels, were assessed. For Machiavellianism, a positive association with BMI (r = 0.29, p < 0.05) and a negative association with systolic blood pressure (r = -0.23, p < 0.05) were found. No relationship between the overall MetS and DT score (r = 0.08, p = 0.409) was observed. The results were limited by the lack of a control group and the cross-sectional study design, which does not allow for the determination of causality. Machiavellianism was associated with a higher BMI and lower systolic blood pressure, indicating a deteriorating health effect of this trait. Possibly, the higher prevalence of MetS in AD stems from aspects such as lifestyle or medication intake, which might also be influenced by DT. Further research is needed to disentangle underlying mechanisms.

Dark Tetrad and COVID-19 protective measures: Mediating effects of risk-taking tendencies

Previous research has shown that Dark Triad traits are tied to non-compliance, while there is not enough research regarding sadism. As dark traits are related to risk-taking behaviors, we hypothesized that proneness to risk-taking could be a mediating mechanism explaining the relation between dark traits and non-compliance with protective measures. Sample comprised of 348 participants (77% women) who completed the Hateful Eight (a multifaceted Short Dark Tetrad scale), DOSPERT for measuring different aspects of risk-taking tendencies, and questions regarding frequency of compliance with protection measures and vaccination. Results showed that recklessness (aspect of psychopathy) and violent voyeurism (aspect of sadism) had negative effects on compliance with protective measures. These relations were fully explained by health/safety risk tendency. Deviousness (aspect of Machiavellianism) contributed to unwillingness to vaccinate against COVID-19 independently of risk-taking tendencies. Furthermore, selection of particular vaccine was not associated with dark traits, but those who selected all vaccines (both EU-approved and non-approved) had higher scores on social risks compared to those who selected only non-approved vaccines. Additionally, those who selected only EU-approved vaccines showed lower scores on ethical risks compared to the rest of the participants who were vaccinated or applied for vaccination.