Not to rain on the fun, but in the psychological assessment course I took a few years ago the professor said that Myers-Briggs is not a legit personality test for a few reasons:
* Even the true M-B test has multiple forms (which is fine). However, you are supposed to check for parallel form reliability when you develop multiple forms and this was not done for M-B. I have taken a couple of different M-B tests over the years and come out either as a raging extrovert or a borderline introvert depending on which form was used, for instance.
* For the constructs it is measuring, save for introversion and extraversion, it isn't considered to do so in a valid manner. For instance, other valid measures of these same constructs don't correlate with the M-B (poor construct validity).
