I think this is the article he referenced
Are advertisers coming for your dreams?
11 JUN 2021
Scientists warn of efforts to insert commercials into dreams
If you've ever crammed for an exam just before bedtime, you may have tried something dream researchers have been attempting for decades: coaxing knowledge into dreams. Such efforts have had glimmers of success in the lab. Now, brands from Xbox to Coors to Burger King are teaming up with some scientists to attempt something similar: "Engineer" advertisements into willing consumers' dreams, via video and audio clips. This week, a group of 40 dream researchers has pushed back in an online letter, calling for the regulation of commercial dream manipulation.
"Dream incubation advertising is not some fun gimmick, but a slippery slope with real consequences," they write on the op-ed website EOS. "Our dreams cannot become just another playground for corporate advertisers."
Dream incubation, in which people use images, sounds, or other sensory cues to shape their nighttime visions, has a long history. People throughout the ancient world invented rituals and techniques to intentionally change the content of their dreams, through meditation, painting, praying, and even drug use. Greeks who fell ill in the fourth century B.C.E. would sleep on earthen beds in the temples of the god Asclepius, in the hopes of entering enkoimesis, an induced state of dreaming in which their cure would be revealed.
Modern science has opened a whole new world of possibilities. Researchers can now identify when most people enter the stage of sleep where much of our dreaming takes place—the rapid eye movement (REM) state—by monitoring brain waves, eye movements, and even snoring. They have also shown that external stimuli such as sounds, smells, lights, and speech can alter dreams' content. And this year, researchers communicated directly with lucid dreamers—people who are aware while they are dreaming—getting them to answer questions and solve math problems as they slept.
"People are particularly vulnerable [to suggestion] when asleep," says Adam Haar, a cognitive scientist and Ph.D. student at the Massachusetts Institute of Technology who co-authored the letter. Haar invented a glove that tracks sleep patterns and guides its wearers to dream about specific subjects by playing audio cues when the sleeper reaches a susceptible sleep stage. He says he has been contacted by three companies in the past 2 years, including Microsoft and two airlines, asking for his help on dream incubation projects. He helped with one game-related project, but says he wasn't comfortable participating in any advertising campaigns.
Work by Harvard University dream researcher Deirdre Barrett has also attracted corporate attention. In a 1993 study, she asked 66 college students taking a class on dreams to select a problem of personal or academic relevance, write it down, and think about it each night for at least a week before going to bed. At the end of the study, nearly half reported having dreams related to the problem. Similar work published in 2000 in Science, in which Harvard neuroscientists asked people to play several hours of the computer game Tetris for 3 days, found that slightly more than 60% of the players reported having dreams about the game.
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