Theoretical and empirical concerns regarding the dark triad as a construct

Area of Science:

• Psychology
• Forensic Psychology
• Personality Science

Background:

• The Dark Triad comprises psychopathy, Machiavellianism, and narcissism.
• Recent research trends combine these into a single Dark Triad construct.
• Theoretical concerns exist regarding the conceptualization of a unified Dark Triad.

Purpose of the Study:

• To theoretically and empirically examine the validity of measuring the Dark Triad as a single construct.
• To investigate the unique contributions of Machiavellianism and narcissism beyond psychopathy.

Main Methods:

• Confirmatory factor analysis was used on a large correctional sample (N = 972).
• Variance partitioning was employed to assess the Dark Triad construct.
• Incremental validity analyses were conducted for Dark Triad traits beyond psychopathy.

Main Results:

• A latent Dark Triad construct could not be reliably estimated, with psychopathy accounting for over 100% of the variance.
• Machiavellianism and narcissism did not provide significant incremental validity over psychopathy.
• Interaction models showed no additional benefit from considering Dark Triad traits in constellation.

Conclusions:

• Measuring the Dark Triad as a singular entity is theoretically and empirically questionable.
• Psychopathy appears to be the dominant construct, overshadowing Machiavellianism and narcissism.
• Future research should differentiate between these distinct, yet related, personality constructs.