Okay... I mean yes, please. Is there another question like "What do you LIVE for" for role variants?
Not quite as much of a simple one, but yes. First one I would ask would be, do you feel like you are naturally inclined to be directive or informative? In other words, do you tend to spend more time telling people (including yourself) what you believe they should or can do OR do you spend more time informing people about your own beliefs or values or issues?
But I'm not certain I would not have been that child... isn't it different comparing children to adults?
Absolutely. And you can't just go by one incident. That was just an example. I'm observed my son for almost eleven years now, and especially since I started really learning about type theories in 2008, I've asked him questions and paid attention to his actions in the context of the theories to get a strong idea of what truly motivates him. Being that he is such an expressive/extroverted child, it hasn't been as difficult as it might have been if he was less so.
As I said, we all seek these four primary ways to happiness, especially as children, but we seek them in varying degrees. And even in children, if you observe them carefully you can see the patterns start to emerge of what they truly go back to time and again.
Also, why are Ns split up by F/T and the Ss split up by J/P?
The short answer is that it's just a coincidence. Now, others have theorized why, mentally, people of these types tend to share common behaviors across the Meyers scales that way, but the bottom line is that Keirsey agreed with Isabel Myers' conclusions that there were significant common behaviors across all four NF types and all four NT types, but did not see as much commonality between SF and ST. But when he compared types that shared SP and SJ in their type, it seemed to form a much more natural grouping, and one that lined up with the historical precedents of four temperament theories that he had previously studied.