Hans Eysenck (only in context with H. J. Eysenck)

Hans J. Eysenck was a prominent psychologist known for his work on personality and intelligence, often referred to as H. J. Eysenck. He developed influential theories suggesting that personality traits can be measured along certain dimensions, primarily extraversion-introversion and neuroticism-stability. Eysenck believed these traits are biologically based, linked to differences in brain arousal. His research aimed to understand how personality influences behavior and mental health. As a respected figure in psychology, his work helped shape modern personality assessment and provided insights into the biological underpinnings of individual differences.