Hans Eysenck

Hans Eysenck was a renowned psychologist known for his research on personality and intelligence. He proposed that personality traits can be measured along two main dimensions: extraversion (outgoingness) versus introversion (reservedness), and neuroticism (emotional stability) versus emotional instability. Eysenck also explored how genetics influence personality and behavior, suggesting that biology plays a significant role. His work helped develop psychological assessments used today and advanced understanding of how individual differences relate to behavior and mental health.