ALFRED BINET(1857 1911)

1857- Born in Nice, France on July 11 1872 -Went to Paris with his mother and attended law school 1883- Accepted a position at the clinic La Salpetriere 1892- Forced to admit that his experiment done with Fere at La Salpetriere was wrong 1890- Resigned from the Salpetriere clinic 1890- Published three papers describing his observations of his daughters 1891 -Joined the Laboratory of Physiological Psychology at the Sorbonne 1894- Became the director at the Sorbonne 1899- Invited to become a member of the newly founded Societe Libre pour l'Etude Psychologique de l'Enfant (the Free Society for the Psychological Study of the Child)

1903- Appointed to the Commission for the Retarded 1903- Developed the first intelligence tests with the help of Simon 1903- Published his methods in the book L'Etude experimentale de l'intelligence 1903 - Appointed to the Commission for the Retarded1903 - Developed the first intelligence tests with the help of Simon 1903 - Published his methods in the book L'Etude experimentale de l'intelligence 1905 - Published a number of papers in L'Annee psychologique describing a new scale for measurement of intelligence in children, the Binet-Simon scale 1908 -Binet-Simon scale is revised, second version 1911 -Binet dies just after the third version of Binet-Simon test is published 1917 - Free Society for the Psychological Study of the Child voted to change their name to La Societe Alfred Binet 1984 -Binet's development of the intelligence test is named one of twenty of this century's most significant developments or discoveries in the journal Science 84

Origins of Intelligence TestingAlfred Binet (1857-1911) was a French psychologist who is credited with inventing the first reliable intelligence testBinet's work on intelligence began in 1904 when the French government commissioned him to develop a test that would identify learning disabilities and other academic weaknesses in grade school studentsBinet, with the help of a colleague named Theodore Simon, took up the daunting task of trying to measure the mental abilities of students. By 1905, Binet and Simon developed their first in a series of tests designed to measure intelligence.It was simply called the Binet-Simon Scale.

BINET- SIMON SCALE

The scale included 30 tasks that were progressive in their difficulty.This test was first given to students in Paris and acted as the reference point for future versions of the intelligence testBased upon his research, he believed that intellectual development was a process that occurred over time. In other words, intelligence was not fixed at birth and simply a matter of genetics but was flexible and could be influenced by the environment to which a child was exposed. 1908, Binet and Simon published a revised 58-items scale that incorporated the concept of mental level.In 1911, a third revision of the Binet- simon scale appearedThe third version of the scale was left unfinished around 1911 and this time Binet arranged the tests according to mental levels from age three fifteen, and he even included five tests for adults.

William Stern (18711938): The Individual Behind the Intelligence Quotient

In 1912 Stern divided mental age by the actual, chronological age of the person taking the test.

In 1916, Terman suggest multiplying the intelligence quotient by 100 to remove fractions.

thus was born the concept of IQ

April 1905: Development of Binet-Simon Test announced at a conference in RomeJune 1905: Binet-Simon Intelligence Test introduced1908 and 1911: New Versions of Binet-Simon Intelligence Test1916: Stanford-Binet First Edition by Terman1937: Second Edition by Terman and Merrill1973: Third Edition by Merrill1986: Fourth Edition by Thorndike, Hagen, and Sattler2003: Fifth Edition by RoidTIMELINE OF BINET- SIMON SCALE