Théodore Simon (French: [sim?~]; 10 July 1873 – 4 September 1961) was a French psychologist who worked with Alfred Binet to develop the Binet-Simon scale, one of the most widely used scales in the world for measuring intelligence.
This scale was revised in 1908 and 1911, and served as a template for the development of newer scales.
Simon worked at various hospitals throughout France, including Sainte-Anne and Dury-les-Amiens.
He also worked as the head psychiatrist at Saint-Yon hospital and as a medical director at Perray-Vaucluse.
He was also the founder of the first nursing school in psychiatry at the Maison Blanche hospital in Neuilly-sur-Marne, in 1946.
The training institute which continues to this day bears his name.