How does one tell the difference? I know Rationals, both EJ and IJ, who cannot relax and sit still for very long; they have to be doing something. Then I know other people who don't have to be 'working' or 'productive', per se, but who need something to keep them occupied (mentally or physically). How does this relate to temperament or functions?
If this is hard to understand, please ask for clarification. My mind's a bit out of it at the moment.