Click here to find the tests for the other preferences. This test makes an estimation of your second MBTI preference. MBTI is the most famous and widely used personality test in the world. It's used by many universities and fortune 500 companies and it's a part of many psychology curriculums. To get your MBTI type you need to find your four preferences and add them together. If you want to be certain about your MBTI type I advice to get professional information.