[jdrobins2000]

I agree, the conclusion drawn is certainly plausible, but there are other possibilities. Does the use of the brain in somewhat complex tasks deplete blood sugar, in a way which the subconscious mind realizes cake would be a more suitable remedy (fast injection of sugar and/or caffeine)? I think various trials are necessary using different "healthy"/"unhealthy" snacks would be necessary to confirm the author's conclusion. For instance, are the results the same for veggies vs. Doritos?

That said, willpower is certainly limited, and effort must be rewarded or it will become harder and harder to press on. Yes, cognitive tasks can be draining, but they can also be rewarding and invigorating, so it's not as simple as drawing from a limited willpower/cognition well.

And yes, I wholeheartedly agree with her sentiment regarding valuing users' cognitive resources, and appreciated how she expressed it. If everyone had such good intentions and proper perspective, the world would be a far better place. Thanks for sharing yourself with us Kathy.