the introverted feeling type has a way of slowing experience down and indulging in it, while disconnecting himself from physical sensations (except for internal body sensing, probably - feeling connects the body, the body is like a vessel for dreams, a canvas). So he creates this sticky slow paced state that is optimal to develop a story telling visualization, a concrete evolving daydream, that may have shamanic content, eg being with imaginary friends or having power animals. I don't say, this is identical to true shamanism, its just a baby variation of it (but may develop later in life). This is what justifies the frequently cited notion that the "infj" (FiNe, socionics got it right) has an enriched inner life. The emphasis is on "inner". It's disconnected (unless you assume a trans-personal connection as is implied by shamanism). this is also what make the Fi type a typical storyteller (author).
Also the introverted feeling type sees personal meaning in everything, especially when these ideas give him the impression of being connected with causality of other people. He will frequently assume that its more than a coincidence, that a close friend is currently interested in the same topic, or makes a similar experience. This is more specific or frequent in the introverted feeling type, than synchronicity, because the emphasis is on connection to people, whereas anyone could see a synchronization, without assuming such.
that about all that i have actually observed.
as for the NiFe type, there is nothing psychic about us, except for a superior theory of mind (not empathy!) and a spacial + naturalistic intelligence that is a bit "mystic" in the sense that it assumes (w)hole-yness and symmetry in natural patterns and is quick to consider portrayed patterns as unnatural or impossible (which often creates early atheism/agnosticism in young and uneducated NiFe people, as a lot of religious patterns in common interpretations are unnatural).
It is that inquisitive search for a picture that unites all of reality, which is a very dynamic associative fast paced process.
the NiFe person does not have an enriched "inner life", he is a perceiver, he as enriched internal observation skills (observation based guesswork, like connecting two dots in the dark into a known face with eyes, to describe Ni in a metaphorical way). call it enriched "mental" life if you want, but its not disconnected at all, except it has a "puffer", that removes it slightly from immediate experience.
feel free to disagree, but no need to cite my essay and take it apart piece by piece ...