Eysenck Personality Questionnaire: Extraversion, Neuroticism, and Psychoticism
The Eysenck Personality Questionnaire (EPQ) is based on Hans Eysenck’s trait theory. It explores Extraversion, Neuroticism, and Psychoticism, plus a response-validity scale. Modern personality research often uses the Big Five as a broader framework, but EPQ remains historically influential.
Updated September 13, 2026 · 5 min read
What does the EPQ measure?
Extraversion concerns social energy and stimulation seeking; Neuroticism concerns emotional reactivity; and Psychoticism is a historical scale related to tough-minded or nonconforming tendencies—not a diagnosis of psychosis. Results should always be interpreted carefully and in context.
EPQ vs. Big Five: what is the difference?
Both are trait approaches. The Big Five has become the more common contemporary research framework because it includes five broad dimensions and substantial cross-cultural support. Comparing both can be educational, but neither replaces professional assessment when one is needed.
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Use this guide alongside your own results. PulseTrait assessments are educational self-reflection tools and do not replace professional advice.
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