A. K. G. Yerkes

A. K. G. Yerkes was an American psychologist best known for his work in comparative psychology and intelligence testing in the early 20th century. He contributed significantly to the understanding of animal behavior and human intelligence. Yerkes is famous for developing the Yerkes-Dodson Law, which describes the relationship between arousal and performance, suggesting that moderate arousal leads to optimal performance, while too little or too much can hinder it. His work has influenced psychology, education, and the study of emotional and cognitive processes, and he played a role in developing intelligence tests for the military during World War I.