If you are sleep-deprived getting more sleep is very effective at raising your performance. If you already get enough sleep, sleeping more won’t help and might even decrease it.
I think you may have misread what I wrote. I pointed out in my original comment that, from what I’ve read, 7.5 hours seems to be not enough sleep. So it would follow that getting more sleep would increase performance. I know that excessive sleep also causes problems, but that’s clearly not relevant here.
If you are sleep-deprived getting more sleep is very effective at raising your performance. If you already get enough sleep, sleeping more won’t help and might even decrease it.
I think you may have misread what I wrote. I pointed out in my original comment that, from what I’ve read, 7.5 hours seems to be not enough sleep. So it would follow that getting more sleep would increase performance. I know that excessive sleep also causes problems, but that’s clearly not relevant here.
Sleep requirements are individual and vary widely. The 7.5 hours is just the mean of a fairly wide distribution.
As a data point, I live in a house with someone who requires about two hours of more sleep per night than I do.