Obligatory references on the subject of the unvalidated Myers-Briggs Type Indicator®: http://www.washingtonpost.com/national/on-leadership/myers-b... "Now, 50 years after the first time anyone paid money for the test, the Myers-Briggs legacy is reaching the end of the family line. The youngest heirs don’t want it. And it’s not clear whether organizations should, either. . . . . "Yet despite its widespread use and vas…
Lots of critical responses here. What is happening is that you can think of a personality profile as a vector in very high-dimensional space. MBTI presents a basis in a 4-dimensional subspace of that. How well it works for a particular person depends on how her personality aligns with that basis. A lot people will test near the middle on the MBTI characteristics, and say that the test does not work for them. If most…
That said, I like MBTI's (or Keirsey's) simplicity. It gives you a lot of data for such a simple system, and is easy to apply. You have to be aware of its limitations, of course. But I've been playing with it for almost 10 years (in my personal life, not so much for work) and it rarely fails me.
I think it's the same principle as the Fibonacci scale for planning poker... you will always have some error in your system, don't fool yourself. So the ROI of a simple system might pay off...
PS: I agree, MBTI seems VERY accurate for people that are not in the middle of the scales, and not-so-accurate otherwise.