Earlier quoted context omitted.
It’s a good point but it’s not equal. Myers Briggs is nice a framework. You can just look at the axes of personality and use them to structure a claim about where you land. The test is not the important bit. I think many people have not considered the dimensions of personality that it proposes. Astrology not so much. You can’t describe yourself as a linear combination of different signs or at least, you’re not meant…
Myers Briggs seems so arbitrary . Why 4 dimensions instead of 3 or 5? And is there any reliable evidence that using it actually produces better outcomes?
As feanaro noted, the 4 dimensions of MBTI is fairly correlated with four of the five factors of the Big 5 (or OCEAN) model. It leaves out neuroticism, which might be helpful in a business context, since you can put a positive spin on both ends of those 4 dimensions. I've seen MBTI extended by adding a Turbulent-Assertive axis to include neuroticism without the pejorative label.
Research has shown that classifying people into the 16 types reduced the statistical predictive power. Nevertheless, the types have value for didactic purposes. It can be easier to understand personality differences by contrasting the extremes rather than the vast muddle of people near the median. Once you can see how extreme differences manifest, it is easier to recognize the more subtle (and statistically more frequent) differences.