What psychological typology did Hans Eysenck introduce, classifying individuals into which two categories?

Hans Eysenck introduced a psychological typology that primarily categorizes individuals as either introverts or extroverts. This classification is based on the degree to which individuals are energized by social interactions and external stimuli. Introverts tend to feel more energized and comfortable in solitary or low-stimulation environments, while extroverts thrive in social situations and gain energy from interacting with others.

Eysenck's emphasis on these two categories stems from his larger theory of personality, which integrates traits such as neuroticism and psychoticism alongside introversion/extroversion. This model helps to understand various personality dimensions and behaviors, providing insight into how different individuals might respond to social situations and environments. Recognizing these traits can contribute to understanding personal motivations, effective communication, and relationship dynamics.