Robert Yerkes

Robert Yerkes, born on May twenty-sixth, eighteen seventy-six, was a prominent American psychologist, ethologist, eugenicist, and primatologist. He is best known for his groundbreaking contributions to intelligence testing and comparative psychology, which have had a lasting impact on the field.

A pioneer in the study of both human and primate intelligence, Yerkes dedicated much of his research to understanding the social behaviors of gorillas and chimpanzees. His collaboration with John D. Dodson led to the formulation of the Yerkes–Dodson law, which explores the relationship between arousal and performance, a concept that remains influential in psychology today.

In the early twentieth century, particularly during the 1910s and 1920s, Yerkes began to advocate for eugenics, a stance that has drawn criticism from modern scholars who view his work as reflective of outdated racialist theories. Despite this controversial aspect of his legacy, Yerkes was recognized for his contributions to science, serving on the board of trustees of Science Service from nineteen twenty-one to nineteen twenty-five.

His accolades include election to the American Academy of Arts and Sciences in nineteen fifteen, the United States National Academy of Sciences in nineteen twenty-three, and the American Philosophical Society in nineteen thirty-six, marking him as a significant figure in the scientific community.