At the end, he gives them four letters, which shows their preference over other personality attributes. For example, whether someone prefers extroversion or introversion, sensing or intuition, feeling or thinking, and judging or perceiving. The Myers-Briggs personality test does not take into account a person's mood or how they are feeling that day. This is why the results are not always the most accurate, because depending on a person's mood, they will answer the questions differently. One day they might be an INFP and a few weeks later they might be an ESFP. But it gives a pretty accurate representation of a person's state of mind.