British-American psychologist who was devoted to the scientific method and studied the basic dimensions of personality and temperament and the dynamic dimensions of motivation and emotion.
He earned a Bachelor of Science from the University of London when he was 19 years old, after being awarded a scholarship to study chemistry.
He was ranked the 16th most influential and eminent psychologist of the 20th century according to a wide ranking.
He married Heather Birkett Cattell.
He attended lectures by Bertrand Russell to learn more about science.