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Area of Science:

  • Forensic Psychology
  • Personality Psychology

Background:

  • Psychopathy is a critical construct in forensic psychology.
  • The Elemental Psychopathy Assessment (EPA) measures psychopathic traits using a five-factor model.
  • Previous research supported the EPA's reliability and validity in US samples.

Purpose of the Study:

  • To independently assess the construct validity and factor structure of the EPA in non-American samples.
  • To confirm the EPA's psychometric soundness across diverse populations.

Main Methods:

  • Conducted exploratory and confirmatory factor analyses (CFA) on three independent non-American samples (N=1,803).
  • Utilized item-based CFA to evaluate scale-item alignment.

Main Results:

  • Confirmed the proposed four-factor structure of the EPA.
  • Demonstrated that EPA items adequately measure their intended scales.
  • Established the EPA as a psychometrically sound instrument.

Conclusions:

  • The EPA is a valid instrument for assessing psychopathy from a dimensional, trait-based perspective.
  • The EPA's overlap with personality units supports its utility in forensic and research settings.