It seems you are looking for information on the (Wechsler Adult Intelligence Scale) and perhaps its use in assessment ("test de WAIS" is French for "WAIS test").
Here is a concise overview: The Wechsler Adult Intelligence Scale (WAIS) is the most widely used intelligence test for adults (ages 16–90). The current version is the WAIS‑IV (fourth edition) or WAIS‑V (fifth edition, released in some countries). test de wais