| A good question for Moser/Dweck would be: is the physiological response of a child to a mistake a function of their blood glucose levels? I suspect that it is: | anecdotally, people are a lot more optimistic and willing to explore an issue instead of yielding to to surface obstacles if they're on a sugar high.

I wondered this as well. Even if it's not necessarily glucose-focused, there are a ton of angles. Depression? The two ends of manic/depressives? Sleep -> mood -> mistake response? Talking to an attractive member of the opposite sex and having it go well/not well?