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Optimizing the Short Dark Triad Scale Using an Ant Colony Optimization Algorithm.

Lukas A Knitter1, Martin Schultze2, Tobias Koch1

  • 1Friedrich-Schiller-Universität, Jena, Germany.

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|March 26, 2026
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Summary
This summary is machine-generated.

This study optimized the Short Dark Triad personality assessment, creating the Dark Triad Snapshot. The new tool offers improved reliability and differentiation of Dark Triad traits.

Keywords:
ant colony optimizationconfirmatory factor analysisdark triadlatent variablesmeasurement invariancereliabilityvalidity

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Area of Science:

  • Psychology
  • Personality Psychology
  • Psychometrics

Background:

  • The Dark Triad (narcissism, Machiavellianism, psychopathy) is crucial in understanding antisocial behaviors.
  • Existing short instruments for the Dark Triad, like the Short Dark Triad, face psychometric criticisms.
  • There is a need for a more reliable and valid assessment tool for Dark Triad traits.

Purpose of the Study:

  • To optimize the Short Dark Triad using modern selection algorithms.
  • To develop a psychometrically sound questionnaire for assessing the Dark Triad.
  • To enhance the differentiation and reliability of Dark Triad personality measurement.

Main Methods:

  • Revision of existing items and addition of new items for the Dark Triad assessment.
  • Application of an ant colony optimization algorithm based on psychometric criteria for item selection.
  • Validation of the revised questionnaire against the Five Factor Model of Personality traits.

Main Results:

  • The revised questionnaire, the Dark Triad Snapshot, demonstrates superior differentiation of Dark Triad facets compared to the Short Dark Triad.
  • The Dark Triad Snapshot exhibits higher reliability and partial scalar measurement invariance between genders.
  • Expert judgment and the inclusion of low agreeableness contributed to the content validity of the new instrument.

Conclusions:

  • The Dark Triad Snapshot is a psychometrically improved instrument for assessing the Dark Triad.
  • The optimized questionnaire offers enhanced reliability and validity for personality research.
  • This study provides a more robust tool for measuring narcissism, Machiavellianism, and psychopathy.