The Myers-Briggs Personality Type Indicator is a personality test based on self-reported questions on 4 categories: introversion or extraversion, sensing or intuition, thinking or feeling, and judging or perceiving.
It is not scientific, and results vary wildly.
It is probably more useful to isolate the four categories. (I N T J), and only pay attention to the categories with a strong (80%+) preference.
INTJ 