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Eysenck's Two Factor Theory

Written by the Fiveable Content Team • Last updated August 2025
Verified for the 2026 exam
Verified for the 2026 examWritten by the Fiveable Content Team • Last updated August 2025

Definition

Eysenck's Two Factor Theory is a psychological theory proposed by Hans Eysenck that suggests personality can be described using two primary dimensions: extraversion-introversion (E) and emotional stability-instability (N). Extraversion refers to the degree of outgoingness or sociability, while emotional stability refers to the level of emotional reactivity and moodiness.

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