Carl Jung describes four psychological functions that are capable of becoming applicable psychically, but to differing degrees in individuals:[131]
Sensation – all perceptions by means of the sense organs
Intuition – perception by way of the unconscious, or perception of unconscious events
Thinking (in socionics, Logic) – judgement of information based on reason
Feeling (in socionics, Ethics) – judgement of information based on sentiment
In addition to these four types, Jung defines a polarity between introverted and extraverted personalities. This distinction is based on how people invest energy: either into the inner, subjective, psychical world (usually called Seele, soul, by Jung), or toward their outer, objective, physical world (including one's body).
https://en.wikipedia.org/wiki/Socionics#History