Katherine Briggs developed the MBTI based on the typological theory of Carl Jung. However, some personality quizzes are purely for entertainment purposes. But they can sometimes show snippets of information and knowledge that cast light on important aspects of personality, behavior, and interests. You ask how the test analyzed my personality and behavior. Emotion, insight, feeling, and thinking are examples of these functions. We all rely more on one function than others. The core of MBTI is identifying our expectations, which are influenced by our motives, beliefs, desires, and inspiration.