Theodore Simon

Colleague of Binet


Major Contribution

  • The Binet-Simon Scale

Ideas and Interests

Theodore Simon, colleague of Alfred Binet in Paris, helped develop and coauthor a test to roughly estimate intelligence. The principal conclusion from their work was that the test could measure the intellectual development of young children between the age of three and twelve years old. Simon also believed that their method was practical, convenient, and rapid.

It was also Dr. Simon who put Jean Piaget in charge of administering Binet’s reading tests on Parisian children. An endeavor which allowed Piaget to develop an enthusiasm into probing the successes and failures of children, leading him into the field of child psychology.


  • Binet, A., Simon, T., The Development of Intelligence in Children, Reprint 1983. Ayer Company, Salem, New Hampshire.

References: 2

Image Courtesy of the Archives of the History of American Psychology, The University of Akron