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

The Dark Triad of personality are often assessed using two short instruments, which have been criticized several times in the past. This study aims to optimize one of the most popular short instruments (Short Dark Triad) using a modern selection algorithm. Existing items were revised, new items were added, and items were selected using an ant colony optimization algorithm based on defined psychometric criteria. The final questionnaire was validated against the traits of the Five Factor Model of Personality. The revised questionnaire, the Dark Triad Snapshot, offers a better differentiation of the Dark Triad facets, higher reliability and partial scalar measurement invariance between male and female participants as the Short Dark Triad. Expert judgment and the inclusion of low agreeableness also ensure content validity.