No statistical measurement or actual attempt at a scientific investigation was done. The classification was purely validated by Isabel Briggs Myers' own free i

No statistical measurement or actual attempt at a scientific investigation was done. The classification was purely validated by Isabel Briggs Myers' own free interpretation of what a particular trait should be. That's self-deception, not science. There's nothing wrong in trying to build an understanding of personalities but making things up just because you think your intuition is all you need to build theories, well, that doesn't inspire much confidence. The Myers-Briggs Test smells like science -it has codes and categories!- but like most pseudo-sciences, no-one has really been interested in validating the assumptions with actual data. Pseudo-Psychology is rife with these wishful-thinking theories that sound kind of right but have no solid data to support them. Not bashing Psychology, I think it's a hugely interesting field, but the science behind a lot of it still remains fishy.