Henri Piéron

Louis Charles Henri Piéron (French: [lwi ʃaʁl ɑ̃ʁi pjeʁɔ̃]; 18 July 1881 – 6 November 1964) was a French psychologist. He was one of the founders of scientific psychology in France. He developed the Toulouse-Piéron Cancellation Test (TP) with Édouard Toulouse.