Depending on the Dark Triad: exploring relationships between malign personality traits, substance and process addictions

Background and objective The present study aimed to contribute to the understanding of addiction formation and maintenance by exploring the relationships between Dark Triad (DT) personality trait levels and addiction tendencies to "substances" and "processes." Incorporating an adapted "Addiction as Excessive Appetites" model within a biopsychosocial framework, relationships between DT trait levels, alcohol, and exercise addictions were examined. Methods Two hundred and eighty-nine adults living in the UK (192 women, 97 men) completed an online questionnaire measuring DT trait levels and indicative addiction scores to alcohol (substance) and exercise (process). These were interrogated using correlation analysis, group mean comparisons and multivariate analysis of variance (MANOVA). Results Significant positive correlations were found between psychopathic, grandiose narcissistic and Machiavellian trait levels with addiction scores to alcohol and exercise. MANOVA demonstrated significant main effects of alcohol and exercise with respect to DT trait levels. In most cases, those in the higher addiction risk groups showed higher psychopathic and Machiavellian trait scores. Conclusions Given the positive associations between DT trait levels and addiction and elevated DT levels in highest risk groups, the data was consistent with the proposed model. Machiavellianism trait levels were more strongly associated with process and substance addictions than found in previous studies.