Today I was thinking about how ADHD/ADD might affect your MBTI code. Someone who might have any of these disorders could very easily come off as a Perceiver, and even more so if unmedicated. If you are a Judger with ADHD/ADD, especially if you're also an introvert, is it possible that your judging functions can remain somewhat underdeveloped and you mistake yourself for a P? For example, an INTJ with ADD who is without a diagnose and medicine with his or her Extraverted Thinking ignored because of all the internal chaos, and who instead mostly uses Ni and Fi, would that person appear more like an INFP?
I haven't really thought his all the way through, but I thought I might share this to see what you think about it..