The fourfold concept of personality as postulated by Jung. Basically, Jung said there are four functions of ego: Feeling, Intuiting, Thinking and Sensing.

QUATERNITY: "Quaternity was observed by Jung in a myriad of ways in reality, including the four points of the compass and the four dimensions."
Cite this page: N., Pam M.S., "QUATERNITY," in PsychologyDictionary.org, April 28, 2013, https://psychologydictionary.org/quaternity/ (accessed November 30, 2020).