Why is it that some N-S types seem to be closer to each other than others? In my experience, INFP and ISFP are very similar, whereas for example INTP and ISTP are very different (though, often, the latter think they're INTP). Can I have your thoughts on this one?
Have you had more experience with isfps and infps than istps and intps?
I think that N-S types are only superficially similar. I think that dominant function pairs are much more similar. I think it has a lot to do with the nature of the individual dominant function and the relationship with the secondary function. Each function is so different and effects the overall personality differently depending on the function order and grouping.
Maybe ISFPs and INFPs seem more similar because Fi is such an all encompassing function, and really draws the user in. Both ISFPs and INFPs actively use their secondary function to gather data but seem to phase out in Fi for extended periods of processing and developing time. Fi reminds of me of Ni in some ways in that it can be wholy engaging for the user. And just an obscure personal observation- ISFPs and INFPs seem to have some physical appearance similarities as well.
Ti, for ISTPs and INTPs seems less all encompassing than Fi for IFPs. When I interact with ITPs I can normally see their secondary function straight away. ISTPs seem to look around a lot, keeny attuned to their external environment, and very obbservant, and with INTPs I notice the speculative theorising, talk of possibilities and this excited spark or bubblyness in their eyes.
I dont think I, as an INFJ have much in common with an ISFJ except for very superficial similarities. The extraverted feeling secondary function is apparent in both types straight away in some observable actions and behaviours but the overall mindest, presence, and approach to life seems very different to me. I feel there is much more similarity between INFJ and INTJ because of the dominant shared function.
I think there are several ways to group types to isolate and consider the strength of various functions and how they effect the overall personality. I think this can be more useful than simply looking at the
I-E, S-N etc dichotomies. I find the dichotomies interesting and useful, but sometimes they can be misleading and not relavant. Preferences on a dichtomy scale can greatly vary for individuals, eg 51% N or 99% N etc
Keirseys- NFs, SPs, NTs, SJs
Dominant function pairs- Ni, Ne, Fi, Fe, Ti, Te, Si, Se
FJs- extraverted feeling
FPs- introverted feeling
Tjs- extraverted thinking
TPs- introverted thinking
NPs- extraverted inuition
Njs- introverted inuition
SPs-extraverted sensing
SJs- introverted sensing
I hope some of this makes sense and isnt too confusing. It has been hard for me to artculate and find words for what I want to say.