Jean Piaget
August 9, 1896 - September 16, 1980
Founder of child psychology.
About him:
At first he was interested into biology but when he moved to France in the 1920's he became interested in psychology. He taught at a school when he learned that younger children made mistakes on answers older kids didn't, which made him go into child psychology "child devlopement". He had a great influence on child education. Piaget also made extraordinary contribuations in sociology, scientfic thought, and experimental psychology.
Family:
His wife was Valentine Chatenay. They had three kids, two daughters, Jacquelin and Lucienne and one son, Laurent.
Other:
He wrote over 70 books in his lifetime. His most famous one that he wrote was in 1926 called "The Language and Thought of the Child".
Fun Fact:
He wrote his first published scientific paper at the age of ten.