Differentiated functions and attitudes focus a person’s intentions and direction. Psychological type theory assumes a hierarchy of consciousness among the functions, with a superior, most differentiated (dominant) function at the top
Quenk articulates the foundational Jungian-Myersian thesis that differentiation produces a ranked hierarchy of functions, with the most differentiated function directing conscious intention and the least differentiated remaining largely unconscious.
, Was That Really Me? How Everyday Stress Brings Out Our Hidden Personality, 2002thesis