It’s possible I misread or misinterpreted the article; but by the description of the testing itself, it sounds to me like what “the flow state” or “the zone” feels like.
Which is fine. The problem for me, is, although I am super effective when “in the zone,” I can’t simply get there on demand. Sometimes it either happens, or it does not (caffeine helps, but doesn’t guarantee success entering the zone).
So, sometimes I’m pretty smart, and other times I’m dumb as a pile of bricks, and I can’t always control which and when.