it says if someone is extraverted or introverted in his conscious life, the person is likely to be the opposite in his sub/unconscious or dream life. an example is when an extraverted becomes moody or unsocial, friends say "whats with him", his unconscoius introverted side is seeping out in sorts. The basic typology consists of two attitudes, extraversion and introversion, and four functions, thinking feeling, sensation, and intuition, making eight types of characters in all. Variations in the degree to which each of the attitudes and functions are consciously developed or remain unconscious and undeveloped can produce a wide range of differences amoung individuals.

This reminds me of a childhood game for some reason