When you take this quiz, we analyze your responses and compare them to how closely they match each of the four Houses, using a standard statistical model designed to measure the relationship between datasets. The data we collected on the personalities of Harry Potter characters, from Harry himself to Professor Snape and Luna Lovegood and many others, shows that there are significant differences in the personality traits of characters from different Houses.
The 21 questions in the Harry Potter personality quiz are drawn from both the Big Five test and a handful of other well-studied personality inventories that measure other traits that are commonly seen in the Harry Potter novels, like “courage” and “humility.” The survey was assembled by Cambridge psychologists Friedrich Götz and Joe Scott in collaboration with TIME.
