Other Free Encyclopedias » Psychology Encyclopedia » Famous Psychologists & Scientists

Clark Leonard Hull

gestalt psychology vocational test psychology hypnosis experimental theory

1884-1952
American psychologist who was a primary representative of the neobehaviorist school.

Clark L. Hull was born in a country farmhouse near Akron, New York, on May 24, 1884. He attended high school for a year in West Saginaw, Michigan, and the academy

Clark Hull (Archives of the History of American Psychology. Reproduced with permission.)

of Alma College. His education was interrupted by bouts of typhoid fever and poliomyelitis, giving him pause to consider possible vocational choices; he decided upon psychology. He then matriculated at the University of Michigan, took his bachelor's degree, and went on to the University of Wisconsin, receiving his doctorate in 1918. Staying on at Wisconsin to teach, Hull was at first torn between two schools of psychological thought which prevailed at the time: early behaviorism and Gestalt psychology. He was not long in deciding in favor of the former.

After an experimental project on the influence of tobacco smoking on mental and motor efficiency, Hull was offered the opportunity to teach a course in psychological tests and measurements. Gladly accepting it, he changed the name to "aptitude testing" and worked hard at developing it as a sound basis for vocational guidance. The material which he collected in this course was gathered into a book, Aptitude Testing (1928). Next, with the help of a grant from the National Research Council, he built a machine that automatically prepared the correlations he needed in his test-construction work.

In 1929 Hull became a research professor of psychology at the Institute of Psychology at Yale University, later incorporated into the Institute of Human Relations. He came to certain definite conclusions about psychology, and in 1930 he stated that psychology is a true natural science, that its primary laws are expressible quantitatively by means of ordinary equations, and that quantitative laws even for the behavior of groups as a whole could be derived from the same primary equations.

The next 10 years were filled with projects dealing not only with aptitude testing but with learning experiments, behavior theory, and hypnosis. As a representative of behaviorism, Hull fell into that school's neobehaviorist period of the 1930s and early 1940s. His basic motivational concept was the "drive." His quantitative system, based on stimulus-response reinforcement theory and using the concepts "drive reduction" and "intervening variables," was highly esteemed by psychologists during the 1940s for its objectivity.

Hull was probably the first psychologist to approach hypnosis with the quantitative methodology customarily used in experimental psychology. This combination of experimental methods and the phenomena provided by hypnosis yielded many appropriate topics for experimental problems by his students. Hypnosis and Suggestibility, the first extensive systematic investigation of hypnosis with experimental methods, was published in 1933, incorporating the earlier, and better, part of the hypnosis program that Hull had carried out at the University of Wisconsin.

In 1940 Hull published, jointly with C. I. Hovland, R. T. Ross, M. Hall, D. T. Perkins, and F. B. Fitch, Mathematico-Deductive Theory of Rote Learning. Three years later his Principles of Behavior was published, followed by a revision of his theories in Essentials of Behavior (1951). Hull expressed learning theory in terms of quantification, by means of equations which he had derived from a method of scaling originally devised by L.L. Thurstone. In his last book, A Behavior System(1952), Hull applied his principles to the behavior of single organisms. His system stands as an important landmark in the history of theoretical psychology. He died in New Haven, Connecticut, on May 10, 1952.

Further Reading

Beach, Frank A. Biographical memoirs. The National Academy of Sciences, vol. 33. 1959

Boring, Edwin G., et al., eds. A history of psychology in autobiography. vol. 4, 1952.

Marx, Melvin H. and William A. Hillix. Systems and theories in psychology. 1963.

Clifford Beers [next] [back] Christine Ladd-Franklin

User Comments

Your email address will be altered so spam harvesting bots can't read it easily.
Hide my email completely instead?

Cancel or

Vote down Vote up

12 months ago

very happy to read that nice and usefull content thanks for share.
http://www.aminegames.com/
http://www.aminegames.com/2016/08/cooking-games.html
http://www.aminegames.com/2016/08/war-games.html
http://www.aminegames.com/2016/08/games-girls-coat.html
http://www.aminegames.com/2016/08/action-games.html
http://www.aminegames.com/2016/08/car-games.html
http://www.aminegames.com/2016/08/girls-games.html
http://www.aminegames.com/2016/08/ben-10-games.html
http://www.aminegames.com/2016/08/makeup-games.html
http://www.aminegames.com/2016/08/barbie-games.html
http://www.aminegames.com/2016/08/intelligence-games.html
http://www.aminegames.com/2016/08/adventure-games.html
http://www.aminegames.com/2016/08/friv-games.html
http://www.aminegames.com/2016/08/mario-games.html

Vote down Vote up

about 1 year ago

Quickbooks Support Number @ http://www.quickbooks.intuit-techsupport.com/
Quickbooks Support Phone Number @ http://www.quickbooks.support-phonenumber.com/
Quicken Support Phone Number @ http://www.quicken.support-phonenumber.com/
Quicken Support Number @ http://www.quicken.intuit-techsupport.com/
Sage Support Phone Number @ http://www.sage.support-phonenumber.com/

Vote down Vote up

over 2 years ago

Delhi Packers and Movers @ http://www.5th.co.in/packers-and-movers-delhi/
Gurgaon Packers and Movers @ http://www.5th.co.in/packers-and-movers-gurgaon/
Noida Packers and Movers @ http://www.5th.co.in/packers-and-movers-noida/
Ghaziabad Packers and Movers @ http://www.5th.co.in/packers-and-movers-ghaziabad/
Faridabad Packers and Movers @ http://www.5th.co.in/packers-and-movers-faridabad/
http://4ad.in/

Vote down Vote up

over 2 years ago

Pune Packers and Movers @ http://www.5th.co.in/packers-and-movers-pune/
Bangalore Packers and Movers @ http://www.5th.co.in/packers-and-movers-bangalore/
Navi Mumbai Packers and Movers @ http://www.5th.co.in/packers-and-movers-navi-mumbai/
Thane Packers and Movers @ http://www.5th.co.in/packers-and-movers-thane/
Mumbai Packers and Movers @ http://www.5th.co.in/packers-and-movers-mumbai/

Vote down Vote up

over 2 years ago

For Shifting and Transporting Services::-

http://www.export5th.in/packers-and-movers-in-hyderabad/ @ Packkers and Movers Hyderabad

http://www.export5th.in/packers-and-movers-in-bangalore/ @ Packers and Movers Bangalore

http://www.export5th.in/packers-and-movers-in-chennai/ @ Packers and Movers Chennai

http://www.export5th.in/packers-and-movers-in-pune/ @ Packers and Movers Pune

http://www.export5th.in/packers-and-movers-in-mumbai/ @ Packers and Movers Mumbai

http://www.export5th.in/packers-and-movers-in-delhi/ @ Packers and Movers Delhi

http://www.export5th.in/packers-and-movers-in-gurgaon/ @ Packers and Movers Gurgaon

http://www.export5th.in/ @ Packers and Movers in India

Vote down Vote up

over 2 years ago

Packers and Movers Chennai @
http://list5th.in/packers-and-movers-chennai/
Packers and Movers Hyderabad @
http://list5th.in/packers-and-movers-hyderabad/
Packers and Movers Bangalore @
http://list5th.in/packers-and-movers-bangalore/
Packers and Movers Mumbai @
http://list5th.in/packers-and-movers-mumbai/

Vote down Vote up

over 2 years ago

Great 5 Packers and Movers in Bangalore or http://www.great5th.in/packers-and-movers-bangalore/
Great 5 Packers and Movers in Delhi or http://www.great5th.in/packers-and-movers-delhi/
Great 5 Packers and Movers in Noida or http://www.great5th.in/packers-and-movers-noida/
Great 5 Packers and Movers in Ghaziabad or http://www.great5th.in/packers-and-movers-ghaziabad/
Great 5 Packers and Movers in Faridabad or http://www.great5th.in/packers-and-movers-faridabad/
http://4ad.in/

Vote down Vote up

over 2 years ago

Great 5 Packers and Movers in Pune or http://www.great5th.in/packers-and-movers-pune/
Great 5 Packers and Movers in Mumbai or http://www.great5th.in/packers-and-movers-mumbai/
Great 5 Packers and Movers in Navi Mumbai or http://www.great5th.in/packers-and-movers-navi-mumbai/
Great 5 Packers and Movers in Thane or http://www.great5th.in/packers-and-movers-thane/
Great 5 Packers and Movers in Gurgaon or http://www.great5th.in/packers-and-movers-gurgaon/

Vote down Vote up

over 2 years ago

These companies are taking away companies suggesting packing in addition to moving services on diverse types of moving circumstances.


Packers and Movers In Faridabad @ http://3th.co.in/packers-and-movers-faridabad/
Packers and Movers In Noida @ http://3th.co.in/packers-and-movers-noida/
Packers and Movers In Delhi @ http://3th.co.in/packers-and-movers-delhi/
Packers and Movers In Ghaziabad @ http://3th.co.in/packers-and-movers-ghaziabad/