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The App of Our Dreams

In a new study, people had more lucid dreams—where they knew they were dreaming—after using an app.

A teen girl dreams she is flying and, within the dream, says she knows it’s a dream.

© Bro Vector/stock.adobe.com; Animation Encyclopædia Britannica, Inc.

Have you ever known you were dreaming while you were dreaming? According to WebMD, about 50 percent of people have had this experience, which is known as lucid dreaming. Now, a study suggests that a phone app can help boost the chances of having a lucid dream.

Researchers at Northwestern University in Illinois built an app that they hoped would encourage lucid dreaming. App users are instructed to listen to a particular sound, such as several beeps, before bed and try to associate the sound with an awareness of their own mind and body. The app then repeats that sound six hours later, while the user is sleeping. The goal is to get the user back into a state of self-awareness so that they come to know when they are dreaming. 

The researchers tested the app on a group of 19 people. They asked the group how many lucid dreams they’d experienced in the previous week and found there was an average of 0.74 lucid dreams. The researchers then asked the 19 participants to use the app every night for one week and found the average number of lucid dreams increased to 2.11.

“That’s a really big increase for lucid dreaming,” Northwestern cognitive neuroscientist Karen Konkoly told Science News. “Lucid dreaming once a week is a lot.”

To test whether the app was responsible for the increased number of lucid dreams, the researchers gathered 112 people for another experiment. All 112 people were asked to listen to certain app sounds before bed. For one night, the app played these same sounds for everyone in the group while they were sleeping. But the next night, only 40 people heard these sounds. Thirty-five people heard different sounds while sleeping, and another 37 heard no sounds.

On the first night, 17 percent of the group had lucid dreams. On the second night, only 5 percent of the people who didn’t hear the before-bed sounds said they had lucid dreams. This suggests that the sounds people hear and practice with before bed can help train their brains to have a lucid dream when they hear the same sounds while sleeping. In other words, the app might work!

Did You Know?

People dream about four to six times each night.

A boy dreams of various things, shown as images of a soccer goal, a monster, a bad grade, puppies, and a video game in a thought bubble as he sleeps.

© IndiaPix, Dogs, anekoho/stock.adobe.com, © Oleksandr Shpak/Dreamstime.com, © Universal Studios, © leungchopa/Shutterstock.com; Animation Encyclopædia Britannica, Inc.

The Night Shift

A woman wearing a sleep mask stretches in bed and says sleep is the most productive part of her day.

© Julia G art/stock.adobe.com; Illustration composite Encyclopædia Britannica, Inc.

Sleep affects our bodies in many ways besides causing dreams that we may or may not remember in the morning. Here’s what’s happening while you’re getting your eight hours.

Brain-tidying. Your brain organizes and stores new information as memories.

Emotions. The brain regulates your emotions—but it needs adequate sleep to do so. So if you stay up too late at night, your moods the next day can be more extreme.

Detox. Your body rids itself of unwanted proteins that build up while you’re awake.

Muscle freeze. Your muscles are frozen for some of the time that you’re asleep. Scientists think this is to stop your body from moving while you’re dreaming.

Fewer bathroom breaks. Your body releases hormones that make you less hungry and stop you from needing to use the bathroom.

Running repairs. Your body restores energy and helps your cells to repair and grow by fueling them with glucose.

Germ-fighting. Your immune system releases proteins called cytokines, which fight infection and inflammation. This is why it’s particularly important to get enough sleep when you’re sick.

The Mystery of Dreaming

A flashing GIF shows five illustrations that depict people dreaming.

The Metropolitan Museum of Art (JP3046), www.metmuseum.org; Cleveland Museum of Art (1946.208), www.clevelandart.org; The Art Institute of Chicago (1930.379), www.artic.edu; Wellcome Collection, London (36752i, 36247i); © Viktar—iStock/Getty Images; Animation Encyclopædia Britannica, Inc.

People have always dreamed, as shown in the artworks above. Not only that, but humans aren’t the only animals that have dreams. 

No one is sure why we dream—but many people have theories. You can read more about the meaning of dreams at Britannica!

WORD OF THE DAY

somnolent

PART OF SPEECH:

adjective

Definition:

: tired and ready to fall asleep

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