Within the depth-psychology corpus, 'Function' designates the foundational Jungian concept of the four psychological modes — Thinking, Feeling, Sensation, and Intuition — through which consciousness orients itself to experience. Jung's original formulation in *Psychological Types* (1921) establishes a hierarchy: one function predominates as superior and receives the preponderance of libido, while the diametrically opposite function becomes inferior and largely unconscious, liable to archaic and autonomous behavior under stress. The auxiliary function occupies an intermediate position, complementing the superior without opposing its nature — a claim whose exact interpretation divided Isabel Briggs Myers from Jo Wheelwright, generating lasting typological controversy. Post-Jungian elaborators have substantially extended this schema: Beebe maps eight function-attitudes onto archetypal positions that constitute the 'spine of personality,' giving each position a presiding archetypal character; Quenk investigates in clinical detail the conditions under which the inferior function erupts beyond ego control. Sharp insists on terminological precision, distinguishing feeling-as-function from affect and emotion. The central tension in this literature runs between the structural or topographical reading — functions as quasi-autonomous psychic organs arrayed in a fixed hierarchy — and the dynamic or developmental reading, wherein individuation proceeds through the progressive differentiation and integration of all four functions into conscious use.
In the library
15 passages
the inferior function remains conscious, at least in its effects; but in a neurosis it sinks wholly or in part into the unconscious. For, to the degree that the greater share of libido is taken up by the favoured function, the inferior function undergoes a regressive development
Jung establishes the foundational mechanics of functional hierarchy: energic investment in the superior function causes the inferior to regress toward archaic, unconscious operation, with pathological implications in neurosis.
Jung, Carl Gustav, Psychological Types, 1921thesis
All of them are required because life itself presents problems that are already differentiated in such a way that only a particular function of consciousness can solve them... the development of consciousness involves the ability to summon the various functions at appropriate times in appropriate ways.
Beebe argues that each of the four functions is teleologically necessary, since life itself presents problems differentiated by type, making the cultivation of all functions essential to full consciousness.
Beebe, John, Energies and Patterns in Psychological Type: The Reservoir of Consciousness, 2017thesis
Jung found that 'for all the types met with in practice, the rule holds good that besides the conscious, primary function there is a relatively unconscious, auxiliary function which is in every respect different from the nature of the primary function'
Beebe cites Jung's own rule that the auxiliary function is constitutively different from the dominant, anchoring the theoretical basis for the sixteen-type model.
Beebe, John, Energies and Patterns in Psychological Type: The Reservoir of Consciousness, 2017thesis
no matter how experienced, skilled, and comfortable we may be in the conscious use of our third and fourth functions, this does not seem to alter its eruption as an inferior function... With sufficient fatigue or stress, our inferior function will take over, quite beyond our control.
Quenk demonstrates that conscious competence with less-preferred functions does not immunize the ego against grip experiences, affirming the structural autonomy of the inferior function under lowered consciousness.
Quenk, Naomi L., Was That Really Me? How Everyday Stress Brings Out Our Hidden Personality, 2002thesis
Psychological type theory assumes a hierarchy of consciousness among the functions, with a superior, most differentiated (dominant) function at the top of the ladder and a largely unconscious (inferior) function at the bottom.
Quenk articulates the hierarchical model of function-differentiation that underlies MBTI-informed clinical practice, linking energy distribution to degrees of conscious accessibility.
Quenk, Naomi L., Was That Really Me? How Everyday Stress Brings Out Our Hidden Personality, 2002supporting
My own addition to type theory was to recognize that such a numbering of functions implies that there are, rooted in the structure of the psyche, eight positions, one for each function-attitude... archetypal qualities adhering to each of the positions
Beebe introduces his signature extension of Jung's model, assigning an archetypal character to each of the eight function-attitude positions, transforming typology into an archetypal psychology of personality structure.
Beebe, John, Energies and Patterns in Psychological Type: The Reservoir of Consciousness, 2017supporting
Apparently seizing on Jung's assertion that the secondary function is 'not antagonistic to' the primary one, Jo Wheelwright concluded that the first two functions would have the same attitude... Isabel Briggs Myers, on the other hand, took Jung's subsequent statement... to mean that the auxiliary must differ from the superior function in attitude.
Papadopoulos maps the central post-Jungian interpretive dispute over the attitude (introversion/extraversion) of the auxiliary function, showing how competing readings of Jung's text generated divergent typological systems.
Papadopoulos, Renos K., The Handbook of Jungian Psychology: Theory, Practice and Applications, 2006supporting
even the inferior function has a shadow: in the case of this individual, who would have an inferior introverted feeling, carried by the anima, a shadow of extraverted feeling could be found.
Papadopoulos reports Beebe's model whereby each of the four primary functions carries its own shadow counterpart, effectively doubling the functional schema and integrating it with shadow theory.
Papadopoulos, Renos K., The Handbook of Jungian Psychology: Theory, Practice and Applications, 2006supporting
In Jung's model, the term feeling refers strictly to the way in which we subjectively evaluate what something, or someone, is worth to us. This is the sense in which it is rational; in fact, to the extent that it is not colored by emotion... feeling can be quite cold.
Sharp insists on terminological precision by distinguishing the Feeling function as a rational evaluative mode from affect or emotion, clarifying a common source of confusion in the typological literature.
Sharp, Daryl, Personality Types: Jung's Model of Typology, 1987supporting
People who prefer Thinking tend to make decisions or reach conclusions by focusing on nonpersonal logical analysis... People who prefer to make their decisions through Feeling tend to focus on people-centered values relevant to the problem at hand.
Quenk operationalizes the rational judging functions for applied typology, contrasting Thinking's impersonal logic with Feeling's value-centered orientation within the MBTI framework.
Quenk, Naomi L., Was That Really Me? How Everyday Stress Brings Out Our Hidden Personality, 2002supporting
Thinking and feeling, on the other hand, operate more deliberately. The thinking type organizes his experience into logical categories and arranges them in a systematic order.
Nichols contrasts the rational functions (Thinking and Feeling) with the irrational perceptive functions (Sensation and Intuition) by distinguishing deliberate organization from automatic, immediate apprehension.
Nichols, Sallie, Jung and Tarot: An Archetypal Journey, 1980supporting
the quaternity of the four functions has been discarded by all except the most dedicated Jungians and is, I suspect, little used even by them
Samuels cites Storr's skeptical assessment of the four-function model's clinical currency, then contests it with Plaut's survey showing substantial ongoing use among Jungian analysts.
Samuels, Andrew, Jung and the Post-Jungians, 1985supporting
nothing is outwardly visible but reserve, secretiveness, lack of sympathy, uncertainty, and an apparently groundless embarrassment. When anything does come to the surface, it is generally an indirect manifestation of the inferior and relatively unconscious functions.
Jung characterizes the visible behavior of introverted irrational types as constituted largely by the indirect expression of inferior functions, illustrating how the functional hierarchy shapes observable personality.
Jung, Carl Gustav, Psychological Types, 1921supporting
functions, psychological, 46ff; role of, in adaptation, 47f; diagram of, 47; ego and 47; see also feeling function; inferior function; intuitive function; sensation function; thinking function
Von Franz's index entry confirms that psychological functions are treated in her work primarily in relation to adaptation and the ego, cross-referencing the full set of named functions.
von Franz, Marie-Louise, C.G. Jung: His Myth in Our Time, 1975aside
inferior function eruptions and forms of, 80–86, 92, 96... individuation contributions of, 54–56... Jung's view of, 48, 51–52, 321–324
This index entry to Quenk's clinical handbook maps the structural scope of her treatment of the inferior function across type groups, midlife, individuation, and the grip experience.
Quenk, Naomi L., Was That Really Me? How Everyday Stress Brings Out Our Hidden Personality, 2002aside