Interesting article, but the results don't reflect the performance of those who have adapted to alternative sleep schedules in the long term. The article states

Interesting article, but the results don't reflect the performance of those who have adapted to alternative sleep schedules in the long term. The article states that subjects were to maintain their sleep schedule for two weeks. I reckon that any sudden shift in sleep schedules would have a good chance of causing fatigue. A more interesting experiment would be to see how those with alternative sleep schedules that have practiced them in the long term compare to those with 8 a day schedules.