Researchers have shown that people who believe they've slept well and "deeply", even when they didn't, perform better on tests than those who're told they slept badly. So simply believing you had a good night's sleep can improve performance.
And then you crash and burn after the test, right?
I've experienced this before actually, and yes it does work. But every time you think about it, you go into remission where all you want to do is catch up on the sleep you've lost.
