According to The Wall Street Journal, a number of people may underestimate the amount of sleep they receive, especially those with insomnia.

Have you ever had nights when you feel like you barely slept, only to hear from your partner in the morning that you were actually out like a light?

It turns out that many people are terrible judges of how much shut-eye they get. That is especially true for those who have insomnia. Many people with insomnia think they sleep much less than they actually do. They tend to misjudge how long it takes for them to fall asleep and how often they wake up during the night. Sometimes people can even mistake being asleep for being awake.

The disconnect between perceived and actual sleep reveals a striking fact about insomnia: You can have insomnia and still get an adequate number of hours of sleep. New research is showing that insomnia is less about the amount you sleep and more about what your brain does during sleep.

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