Maggie Jones writes the topic in the New York Times. She wants to tell people how long people should sleep for one day, and she had a sleep-time experiment for people. The test focused on people’s attention with different sleeping time. The group with eight-hours sleep did fewer mistakes in the test. The people with fewer hours for sleep had lower attention. But the researcher didn’t know seven-hour for sleep was enough or not. Consequently, the author suggested people should sleep eight hours at night.
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