A recent meta-analysis of 57 studies published in Nature Human Behaviour reveals that adults over age 50 who regularly use everyday digital technologies—such as smartphones, computers and the internet—have about a 58 percent lower risk of cognitive impairment. The findings challenge the widespread belief that screen time inevitably erodes brain health.
According to The Washington Post’s reporting, the positive link persists even after adjusting for education level, wealth, and health factors. “We saw that older adults who are engaging with technologies overall seem to be having less diagnoses of dementia, mild cognitive impairment, better scores on cognitive measures,” said Jared Benge, associate professor at Dell Medical School (University of Texas at Austin), and one of the study authors.
Researchers note the relationship is likely bidirectional: people with stronger cognition may be more likely to engage with technology, and technology use may itself help maintain cognition. The study highlights three ways technology may support cognitive health: through complexity (mentally challenging tasks), connection (social ties via digital tools), and compensation (apps or devices helping memory, navigation or daily tasks).
Still, the researchers caution against uncritical use of screens. Some data show that very high levels of internet use might correlate with higher dementia risk, and passive digital activities (such as watching TV) may even increase risk. “Too much of anything is not a good thing,” noted Virginia Chang of NYU’s School of Global Public Health.
Practical advice for older adults: ease into technology using patient, trained instructors (rather than well-intentioned but possibly frustrated family members), monitor screen time periodically, and ask whether the device use is offering mental benefit or simply a distraction.
In sum, digital tools are not inherently harmful to aging brains—in fact, they may offer a protective boost when used thoughtfully. But as The Washington Post reports: “These are tools. They’re not some predefined reality. So use the tools that are good for you and avoid the tools that you aren’t getting a benefit from.”
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