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“A study in 2019 found that the spatial memory used for navigating through the world tends to be worse for people who’ve made extensive use of map apps and GPS devices…” reports NBC News.

But that’s just the beginning, according to Adrian Ward, who studies psychology at the University of Texas at Austin. NBC says Ward’s research suggests “People who lean on a search engine such as Google may get the right answers but they can also end up with a wrong idea of how strong their own memory is.”

In Ward’s research, published in October in the journal Proceedings of the National Academy of Sciences of the United States, he used a series of eight experiments to test how people used and thought about their own knowledge as they completed short quizzes of general knowledge. Some participants had access to Google while answering the questions — “What is the most widely spoken language in the world?” was one — while others did not. They also completed surveys. He found that people who used Google were more confident in their own ability to think and remember, and erroneously predicted that they would know significantly more in future quizzes without the help of the internet. Ward attributed that to Google’s design: simple and easy, less like a library and more like a “neural prosthetic” that simulates a search in a human brain.

“The speed makes it so you never understand what you don’t know,” Ward said.

The findings echo and build on earlier research, including a widely cited 2011 paper on the “Google effect”: a phenomenon in which people are less likely to remember information if they know they can find it later on the internet…. In a review of recent studies in the field, published in September, researchers at Duke University found that the “externalization” of memories into digital spheres “changes what people attend to and remember about their own experiences.” Digital media is new and different, they wrote, because of factors such as how easily images are edited or the huge number of memories at people’s fingertips.

Each photographic cue means another chance for a memory to be “updated,” maybe with a false impression, and each manipulation of a piece of social media content is a chance for distortion, wrote the researchers, doctoral student Emmaline Drew Eliseev and Elizabeth Marsh, a professor of psychology and neuroscience and director of a lab dedicated to studying memory.

In a five-year, $77 million project by the Department of Defense to create an implantable brain device that restores memory-generation capacity for people with traumatic brain injuries, a device has now been developed by Michael Kahana, a professor of psychology at the University of Pennsylvania, and the medical technology company Medtronic Plc, and successfully tested with funding from America’s Defense Advanced Research Projects Agency (Darpa).

Connected to the left temporal cortex, it monitors the brain’s electrical activity and forecasts whether a lasting memory will be created. “Just like meteorologists predict the weather by putting sensors in the environment that measure humidity and wind speed and temperature, we put sensors in the brain and measure electrical signals,” Kahana says. If brain activity is suboptimal, the device provides a small zap, undetectable to the patient, to strengthen the signal and increase the chance of memory formation.

In two separate studies, researchers found the prototype consistently boosted memory 15 per cent to 18 per cent. The second group performing human testing, a team from Wake Forest Baptist Medical Center in Winston-Salem, N.C., aided by colleagues at the University of Southern California, has a more finely tuned method. In a study published last year, their patients showed memory retention improvement of as much as 37 per cent. “We’re looking at questions like, ‘Where are my keys? Where did I park the car? Have I taken my pills?’â” says Robert Hampson, lead author of the 2018 study…

Both groups have tested their devices only on epileptic patients with electrodes already implanted in their brains to monitor seizures; each implant requires clunky external hardware that won’t fit in somebody’s skull. The next steps will be building smaller implants and getting approval from the U.S. Food and Drug Administration to bring the devices to market… Justin Sanchez, who just stepped down as director of Darpa’s biological technologies office, says veterans will be the first to use the prosthetics. “We have hundreds of thousands of military personnel with traumatic brain injuries,” he says. The next group will likely be stroke and Alzheimer’s patients.

Eventually, perhaps, the general public will have access—though there’s a serious obstacle to mass adoption. “I don’t think any of us are going to be signing up for voluntary brain surgery anytime soon,” Sanchez says. “Only when these technologies become less invasive, or noninvasive, will they become widespread.”