I have been thinking about this for weeks – and what I can tell you is that I don’t have just one answer. I don’t even have just one answer when I narrow it down to being in regards to how I think about S and N while typing (which I’m going to do, because otherwise this is going to turn into an essay).
The truth is, I prefer not to bring S vs N into typing wherever possible – if I can type someone based on their voice or the way they walk or the muscle tension in their face when they smile – does that specific thing map directly on to someone I’ve already typed? – I’d take that any day.
It is useful, though, when I don’t have enough people to compare to, to be able to reduce to S-ish and N-ish stereotypes – are you a jock or a nerd? Or maybe historically, are you a warrior or an intellectual?
Unsurprisingly, this has huge limitations. There are people who comfortably fit both, and people who fit neither. People I type this way tend to be tentative until I can find enough people who are like them to tie them more firmly to the tag.
The stereotyping tends to make things go particularly awry when you get to people who are shadow-functioning (which amongst other things can mean that they aren’t comfortably fitting into S or N). Everyone’s got the potential to use both their N and S functions well, so since I can’t actually mind read for thoughts and motivations, I try to look for the things that are untrained, or are harder to change – body language, muscle tension, speech patterns, etc.. You can teach yourself academic lingo, you can train your body in any number of athletic pursuits, you can learn to give speeches and how to project your voice, you can figure out how to effectively dress yourself. The trick, I guess, is trying to figure out what is learned (or thrust on you) and what is a default setting. Sometimes people grow more out of their type, and sometimes they grow more into it.
Thankfully, I have not only stereotypes, but my own experience of Ns and Ss to draw on – I think sometimes it can be easier to tell in person, just because of the way you bounce off each other. And then there’s the fun and exciting benefit of being able to ask leading questions.
I think maybe the best way to think of S or N (for typing purposes, anyway) is as a starting point, or maybe as a balance tipped more in one direction.
(…bar graph? ….pie chart?).