<human>:  With regards to the psychology of Carl Gustav Jung, how many types of personality are there?
<bot>: There are 16 types of personalities, according to Jung. They are all based on the 4-quadrant model of personality, which divides the personality into 4 quadrants. The four quadrants are extroversion/introversion, sensing/intuition, thinking/feeling, and judging/perceiving. The 16 types of personalities are: