Sometimes reading descriptions of the inferior functions can discern which type you might be when you're 'not at your best', so to speak.I ve actually taken the myers briggs test for a couple of times. The first time i tried it, it said i was isfj, but after doing some research i came to the conclusion that im not THAT nice to other people or just not that helpful and always available to help and also my friends have told me that i have to losen up and be a bit more open and ''emotional'' so there is that. I took the test again and it showed me that i was isfp, istj and even istp, as you said. With that said, im definetely an introvert sensor but im not sure about those two other letters. The problem is that i have some things going on inside my head like depression and anxiety and i dont know if im completely honest when i take the test, cause when i take it im in a completely different mood than when im interacting with people.
For ISxJ the inferior function is Ne. For ISFP it is Te, and ISTP it is Fe. Those are all very different. This is short and sweet: https://allaboutmbti.tumblr.com/post/181781588467/identifying-your-inferior-function
Inferior Ne: I like to feel secure. Stress causes me to start thinking about things that could go wrong, and I get overwhelmed and worry. Sometimes I need a push to get me to do things because I’m focusing on worst-case scenarios.
Inferior Te: I procrastinate and have a hard time finishing things. I’m really disorganized, but sometimes I get stressed and want to put things in order. I tend to snap at people and become harsh under pressure.
Inferior Fe: I’m not good at dealing with other people’s feelings. I can have emotional explosions when under extreme stress. I don’t mind offending someone with the truth, but I feel uncomfortable when my relationships are in turmoil.
From your responses, you made statements similar to inferior Ne (anxiety/uncertainty over anger/intolerance). Does this ring true for you?
You don't come off as high F preference from what you've written so far. ISTJ seems like a strong possibility.
I'm sorry to hear you're dealing with anxiety and depression. :sad: That's no good... self-analysis becomes more meaningful under those circumstances, even if more difficult.