Modern I.Q. Theorists - J.P. Guilford

RANDOM QUOTE: "A single sentence will suffice for modern man: he fornicated and read the papers. ? Rambler" --- Albert Camus

J.P. Guilford


Integrated psychophysics, psychometrics, measurement and factor analysis


  • University of Nebraska
  • Cornell University under E. B. Titchener
  • Postdoc at University of Nebraska


  • Director of the Psychology Clinic (1919-1921)
  • Associate Professor at University of Nebraska
  • Professor at University of South California (1940)
  • Director of Psychological Research #3 at Santa Ana Army Air Base (1941)


Carried L.L. Thurston's approach further

Ideas & Interests

  • Three dimensional "Structure of Intellect" (classified intellectual acts into 120 separate categories)-- Operations dimension, Products dimension, Material or content dimension
  • (Developed firm convictions regarding the ability of individual difference among people)
  • (Researched in selection and classification of aircrew trainees. Many existing tests were modified and developed under his guidance by using factor analysis)
  • "Intelligence" is too complicated to be subsumed by a few primary mental abilities and "g" factor


Psychometric Methods (1936)

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