What does Р and И mean ?

[Squirrel]

Hi

I was enjoying a Russian test and although the best result wasn't the best thing, I looked at the other possible results, I noticed р and и ( in English R and I )
It looked like a subtype but I didn't understand what does it mean

Anybody knows what's that ?

btw , here's the link to people who wants to try it ( use any translation service )

https://mysocio.ru/test/tolstikova

[ouronis]

probably rational/irrational