Recently I learned that the negative effect of sleep deprivation on cognitive performance seems to accumulate over several days. Five days of insufficient sleep can lower cognitive performance by up to 15 IQ points according to this source.
This definitely tracks with my experience, especially since (apparently) the normal work/​school week is exactly 5 days long, meaning 5 nights in a row of restricted sleep.
Recently I learned that the negative effect of sleep deprivation on cognitive performance seems to accumulate over several days. Five days of insufficient sleep can lower cognitive performance by up to 15 IQ points according to this source.
This definitely tracks with my experience, especially since (apparently) the normal work/​school week is exactly 5 days long, meaning 5 nights in a row of restricted sleep.