A recent study, published in Psychological Science, has investigated the relationship between listening to music and sleeping, focusing on a rarely explored mechanism: Involuntary musical imagery, or “earworms”, i.e. when a song or melody is repeated over and over in a person’s mind.
These commonly occur while you’re awake, but they can also occur while you’re trying to sleep.
Earworms
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The study involved a survey and a laboratory experiment. The survey involved 209 participants who completed a series of surveys on sleep quality, music listening habits, and the frequency of earworms, including how often they experienced an earworm while trying to fall asleep, waking up in the middle of the night, or waking up in the morning.
In the experimental study, 50 participants were taken to the Cognition and Neuroscience Laboratory at Baylor, where the research team tested earworms to determine how they affected sleep quality.
Polysomnography, a complete test and gold standard measure for sleep, was used to record participants’ brain waves, heart rate, breathing and other variables while they slept.
These results are contrary to the idea of music as a hypnotic that could help you sleep. Health organizations generally recommend listening to quiet music before bedtime, recommendations that arise largely from self-reported studies.
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Instead, this study has objectively measured that the sleeping brain continues to process music for several hours, even after the music stops.
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