A multiple sleep latency test (MSLT) measures how sleepy a person is during their waking hours. It can help doctors diagnose causes of excessive daytime sleepiness, such as narcolepsy. An MSLT usually ...

Both at-home sleep tests and smartwatches gather data on your sleep. Here's how to decide which one is right for you. Taylor Leamey wrote about all things wellness for CNET, specializing in mental ...