British-American psychologist who was simply specialized in the medical method and analyzed the essential dimensions of personality and temperament as well as the powerful dimensions of motivation and emotion. He gained a Bachelor of Technology from the University or college of London when he was 19 years of age, after being granted a scholarship to review chemistry. He was rated the 16th most important and eminent psychologist from the 20th hundred years according to a broad ranking. He wedded Heather Birkett Cattell. He went to lectures by Bertrand Russell for more information about science.