John Yerkes

John Yerkes was a psychologist best known for developing the "Army Alpha" and "Army Beta" tests during World War I. These tests were designed to quickly assess the intelligence and cognitive abilities of soldiers to assign them suitable roles. Yerkes' work was significant in the early development of large-scale psychological testing and intelligence measurement. His methods helped demonstrate the potential of standardized testing in education, employment, and military contexts, shaping modern approaches to psychological assessment.