Alfred Binet took his first degree in law in Paris. While in Paris he became acquainted with Jean Charcot and studied hypnosis under him. His interests changed to the natural sciences, in which he received his second degree. He became particularly interested in the higher mental processes of humans. Binet soon became interested in abnormal psychology and wrote the Alterations of Personality and Suggestibility . In addition, he became concerned about the thinking process in children and much of his data was based on studying his own daughters. He gave them problems to solve and asked them to report to him the steps they went through in the process. All this led to his concept of intelligence. He became aware that considerable individual differences existed in children. He realized that there were those who were slow, whom he identified as “feebleminded.” He was sharply critical of the medical profession for considering mental deficiency a disease. He was aware of the work of Ebbinghaus…