William Sheldon

William Sheldon was an American psychologist known for developing a theory linking physical body types to personality traits, called somatotyping. He categorized people into three main body types: ectomorphs (thin and fragile), mesomorphs (muscular and athletic), and endomorphs (rounder and softer). Sheldon believed these body types could influence behavior and temperament, suggesting a relationship between physical appearance and personality. While influential historically, his ideas lack strong scientific support today and are considered outdated in modern psychology.