My scores at stuff like Lumosity and Quantified Mind tend to always be great in the morning (a couple hours after I wake up), but unless I slept enough the previous night they suck balls in the early afternoon; they get better again in the evening if I take a nap in the afternoon. My self-perceived wakefulness and willpower levels vary similarly, but several hours earlier (i.e. I underestimate my mental performance right before lunch and overestimate it right after my afternoon nap).
My scores at stuff like Lumosity and Quantified Mind tend to always be great in the morning (a couple hours after I wake up), but unless I slept enough the previous night they suck balls in the early afternoon; they get better again in the evening if I take a nap in the afternoon. My self-perceived wakefulness and willpower levels vary similarly, but several hours earlier (i.e. I underestimate my mental performance right before lunch and overestimate it right after my afternoon nap).