He developed the Toulouse-Piéron Cancellation Test (TP) with Édouard Toulouse.

[1] Henri Piéron was Professor of Physiology of Sensation at the Collège de France from 1923 to 1951.

He took part in the first Davos University Course (a project to start an international university based in Davos) in 1928, along with many other prominent academics such as Albert Einstein and Hans Driesch.

[2] The same year, he created the Institut national d'orientation professionnelle (INOP), which became the Institut national d'étude du travail et d'orientation professionnelle (Inetop) in 1942, and is now supported by the Conservatoire National des Arts et Métiers.

After founding the first institute for "careers", he took charge of training guidance counsellors and conducted research into the field of counselling psychology.