Using Tech Might Actually Help Protect Your Brain, New Study Finds

As the first generation raised with modern technology begins to enter their golden years, scientists are starting to uncover how decades of tech use may impact brain health—and the results are surprising.

A new study published in Nature Human Behavior reveals that regular use of technology—like smartphones, computers, and the internet—may lower the risk of developing cognitive decline, including conditions like dementia. In fact, researchers found that tech-savvy seniors were 42% less likely to experience cognitive impairment compared to their less tech-involved peers.

The study, a meta-analysis from two Texas universities, examined 57 research papers involving over 411,000 adults—mostly aged around 68. Researchers wanted to test the “digital dementia hypothesis,” which claims that relying on technology weakens the brain over time. Instead, the results point toward the opposite: thoughtful tech engagement might strengthen cognitive resilience.

“The effects remained strong even after factoring in things like income, education, and lifestyle,” said Dr. Jared Benge, a neuropsychologist at UT Austin’s Dell Medical School and co-lead author of the study.

While social media use showed mixed results, none of the studies reported an increased risk of cognitive decline from technology use. That’s a level of consistency that experts call “rare” in this kind of research.

Well, yes—but with a few caveats. Experts emphasize that this doesn’t mean endless scrolling on your phone is suddenly healthy.

“Our findings aren’t an endorsement of mindless tech use,” Benge said. “But they do show that engaging with tech tools can provide some cognitive benefits—especially for the generation that helped build the digital world.”

And it’s not just about swiping through apps. Learning how to use new devices or navigating unfamiliar programs can provide powerful mental stimulation. That effort is what researchers say may help preserve brain function as we age.

While the results are encouraging, the study also had limitations. It didn’t track how long or how people were using their devices. Was it brain-teasing activities like problem-solving and communication, or more passive scrolling and streaming?

“We don’t yet know how much is too much, or what types of tech engagement are the most helpful,” said Dr. Christopher Anderson, a neurologist at Brigham and Women’s Hospital in Boston.

That’s partly because technology has evolved so quickly. The types of tech used 20 years ago required more effort—think dial-up internet and early desktops. Today’s tech is often faster and more passive, so it’s unclear if future generations will experience the same benefits.

The study leans toward the “cognitive reserve” theory, which suggests that mentally stimulating activities—like using tech—can build up resilience in the brain. This reserve can help buffer against age-related decline and even mild forms of dementia.

Tech can also foster social connections, which are crucial for mental health. Loneliness, on the other hand, has been consistently linked with a higher risk of cognitive decline.

Even though the study didn’t pinpoint exact best practices, experts do have some guidance:

• Use tech in moderation. Overuse can still cause issues like eye strain or neck pain.
• Engage meaningfully. Seek activities that involve creativity, learning, or connection—like video calls, online classes, or puzzle games.
• Mix it up. Combine tech use with offline activities such as reading, walking, or socializing in person.
• Don’t be afraid to learn. Even older adults with mild cognitive issues can benefit from learning to use new devices, and that mental challenge can be a healthy brain workout in itself.

“Too much of anything can be a bad thing,” said Dr. Amit Sachdev, a neurologist at Michigan State University. “But purposeful tech use that stimulates, connects, or educates? That’s a win.”

Source: CNN – Technology use may be associated with a lower risk for dementia, study finds