It's not sarcasm, because my comment was not if the persons politically in charge of the major world powers, have those traits in the correct measure.
I was pointing to the fact the paper is not measuring those traits, and they are certainly more important than mental speed. And even that, the paper says until 60 only decreases as older persons take more time to more carefully consider their decisions.
OP seemed to be worried that as they are older, the paper would imply their mental ability was somewhat diminished or less capable, and I pointed to other traits very important, the paper does not analyze.
I was pointing to the fact the paper is not measuring those traits, and they are certainly more important than mental speed. And even that, the paper says until 60 only decreases as older persons take more time to more carefully consider their decisions.
OP seemed to be worried that as they are older, the paper would imply their mental ability was somewhat diminished or less capable, and I pointed to other traits very important, the paper does not analyze.