I have come across a theory relating to Jung Function Theory normally addressed as 'Dom-Tert' loops. I will briefly explain:
In Jung Function Theory, everyone has 4 of 16 functions. They split into Introverted/Extroverted, Sensing/Intuiting, and Thinking/Feeling. These, in broad strokes, aim to explain how people function in both Information Gathering (S/N) as well as Information Processing (T/F) and whether that has a subjective base, or an objective base (I/E).
This theory lays out that the first (or dominant) function and the third (or tertiary) function form a feedback loop, and the second function becomes underdeveloped. Below is an excerpt that hopefully gives an example of this at work (Myers Briggs notation is used as shorthand here):
ENTP/ESFJ: Ne/Fe or Fe/Ne--Narcissistic Personality Disorder. This type often behaves impulsively and manipulatively, needing constant approval and admiration from others, running around investing in new thing after new thing, but never developing the self-confidence of a strong, subjective perspective. Fe used negatively may use its awareness of the cultural standards of others to intentionally offend or upset them, in order to service Ne's curiosity about the patterns in their responses. If Ti/Si were working properly, it would give the user a balancing sense of personal, subjective importance and free him of his dependence upon the adulation and unconditional acceptance of others. (Horrible example: Patrick Bateman from American Psycho.)
The crux being that everyone must use a balance of subjective and objective reasoning and perception to function correctly.
Now I realise that Jung Function theory is a favourite with armchair psychologists, and it's validity has been questioned, but I wanted to know if this theory is either a) expressed formally in any kind of Jung Function theory study, or b) if something like this imbalance leading to personality disorders exists in other psychological theories?
Where does this idea come from? The writer of the above forum post doesn't seem to take credit for the idea or even lead us to what inspired them.