The effects on cognition of sleeping 4 hours per night for 12-14 days
When I go many days in a row without enough sleep, I find that my cognitive abilities (i.e. what I am capable of doing) does not seem to significantly decline--as judged by things I build and people I interact with.<p>But, my endurance of focus (the amount of time for which I can perform at a high level) does suffer.<p>The weird thing is that it doesn't feel like I <i>can't</i> keep going... it's just that I sort of somehow don't keep going. I find my mind wandering more easily, checking in on social media more, and then time passing more quickly when I do. I'm more likely to look up from Twitter or HN and be surprised at the time.<p>In short I don't seem to be any dumber while doing something, but number of things I get done in a typical time periods declines.<p>As I have come to understand this impact, it has given me greater empathy for addicts. My brain doesn't feel like a tired muscle, or like I'm doing anything wrong in the moment. It's only later, when I look back, that I realize I was making bad decisions and losing time. It has just reinforced how hard it is to use decision-making to recover from a situation where the brain has already been compromised by bad decisions.