Ah yes, of course. I forgot about the difference in people versus how they effect me with what I posted.
I've proposed this before, it would be helpful. I've been trying to work on them but I've come up blank with everything but IP, and then I have a little bit of stuff for the others. Eh.
I am actually writing a book on typology, compiling a bunch of my articles here and rewriting/editing into something cohesive that the average person could read and appreciate in everyday life. I think it's high time the many errors in the MBTI approach were formally corrected.
Introverts are actually a little more complex than Extroverts from one perspective because their dominant function contradicts the P/J attitude in their type.
This seems counterintuitive at first, but it's easy when you just conceptualize each Introverted type as its Extroverted equivalent with inverted priorities.
The P/J doesn't tell you whether you're dominant in a Perceiving or a Judging function; it tells you which of your two primary functions is extroverted/handles the outer world.
EPs are easy to describe because they epitomize P attitudes. Ne/Se are actually more similar to
each other than they are to Ni/Si. They are very obviously random, spontaneous, adaptable and open to virtually any new experience just for its own sake. When they go into secondary Ji mode, they temporarily look like their IP cousins.
EJs epitomize J attitudes; they're outwardly directive and work best when they can organize others into their plans to produce results. When they go into secondary Pi mode, they temporarily look like their IJ cousins.
IPs are really just EPs with priorities reversed, so often it's difficult to distinguish which is which upon first meeting someone. You might see an INTP who just happens to be in secondary Ne mode that night, and easily mistake him for an ENTP because they look virtually the same. When IPs go into secondary Pe mode, they temporarily look like their EP cousins.
And so IJs are just EJs with priorities inverted; they use the same Je/Pi processes but spend more time in Pi mode, so that Pi becomes the dominant and Je the auxiliary. Naturally, IJs in secondary Je mode look temporarily like EJs. It's really that simple.
So remember:
xxxJ = Je + Pi (or Pi+Je)
xxxP = Pe + Ji (or Ji+Pe)
Exxx = Xe + Xi
Ixxx = Xi + Xe