Definition

Noun A personality assessment tool, specifically a self-report questionnaire, developed from the psychological theories of Hans Eysenck. It is designed to measure fundamental dimensions of personality, primarily based on Eysenck's factor-analytic model which posits three core traits: Extraversion-Introversion, Neuroticism-Stability, and Psychoticism-Socialization (with the first two being the most prominent and widely recognized).

Usage

The term is used to refer to the specific psychometric test itself or the underlying theoretical model it represents. It is a proper noun for a published psychological instrument.

Examples - The researcher administered the Eysenck Personality Inventory to all participants in the study. - Her scores on the Eysenck Personality Inventory indicated a high degree of extraversion and emotional stability. - The Eysenck Personality Inventory is often contrasted with other models, like the Five-Factor Model.

Advanced Usage

• EPI: This is the common acronym for the Eysenck Personality Inventory.
  • Participants completed the EPI during the first session.
• The inventory is foundational for research into the biological bases of personality traits, as Eysenck hypothesized that differences in traits like extraversion were linked to cortical arousal levels.

Variants and Related Words

• Eysenck Personality Questionnaire (EPQ): A later, revised version of the inventory that includes the third factor, Psychoticism.
• Eysenck's PEN Model: Refers to the three-factor theoretical model (Psychoticism, Extraversion, Neuroticism) underlying the inventory.

Synonyms

• Personality test (general term)
• Trait inventory (general term)
• Psychometric instrument (general term)

Related Concepts

• Extraversion-Introversion: A primary dimension measured by the inventory, concerning sociability, excitement-seeking, and positive emotionality versus quietness and low arousal needs.
• Neuroticism: A primary dimension measured by the inventory, concerning emotional instability, anxiety, moodiness, and stress reactivity.
• Factor analysis: The statistical method used by Hans Eysenck to derive the core personality factors.
• Self-report: The method by which the inventory is completed; individuals answer questions about their own feelings and behaviors.

Noun

1. a self-report personality inventory based on Hans Eysenck's factor analysis of personality which assumes three basic factors (the two most important being extraversion to introversion and neuroticism)