As the first generation that interacted with digital technology reaches an age where dementia risks emerge, scientists have asked the question: Is there a correlation between digital technology use and an increased risk of dementia? With the phrases “brain rot” and “brain drain” circulating on social media, it would appear that most people would assume the answer is yes. However, a new study in Nature Human Behavior by neuroscientists at Baylor University and the University of Texas at Austin Dell Medical School reveals the opposite – digital technologies are actually associated with reduced cognitive decline.
The study – A meta-analysis of technology use and cognitive aging – was sparked by the ongoing concern about the passive activity of digital technologies and their relation to accelerating risks of dementia. Study co-authors are Jared F. Benge, Ph.D., clinical neuropsychologist and associate professor of neurology at Dell Medical School and UT Health Austin’s Comprehensive Memory Center within the Mulva Clinic for the Neurosciences, and Michael K. Scullin, Ph.D., associate professor of psychology and neuroscience at Baylor.
“You can flip on the news on just about any day and you’ll see people talking about how technologies are harming us,” Scullin said. “People often use the terms ‘brain drain’ and ‘brain rot,’ and now digital dementia is an emerging phrase. As researchers, we wanted to know if this was true.” The “digital dementia” hypothesis predicts that a lifetime of exposure to digital technology will worsen cognitive abilities. On the contrary, the study’s findings challenge this hypothesis, indicating instead that engagement with digital technology fosters cognitive resilience in these adults. Reviewing more than 136 studies with data that encompassed over 400,000 adults, and longitudinal studies with an average of 6 years of follow-up data, Scullin and Benge found compelling evidence that digital technology use is associated with better cognitive aging outcomes, rather than harm.
The researchers’ study supported the “technological reserve” hypothesis, finding that digital technologies can promote behaviors that preserve cognition. In fact, their study revealed that digital technology use correlates with a 58% lower risk of cognitive impairment. This pattern of cognitive protection persisted when the researchers controlled for socioeconomic status, education, age, gender, baseline cognitive ability, social support, overall health, and engagement with mental activities like reading that might have explained the findings.
Increase in problem-solving skills Scullin said that for some, these findings are surprising as technology use is often associated with being sedentary both physically and mentally. However, for the current generation of older adults who were introduced to the first technological advancements – computers, the Internet and smartphones – past their childhood, using technology is cognitively challenging because it is everchanging.
“One of the first things that middle-age and older adults were saying is that ‘I’m so frustrated by this computer. This is hard to learn.’ That's actually a reflection of the cognitive challenge, which may be beneficial for the brain even if it doesn’t feel great in the moment.” Scullin said. Technology requires constant adaption, he said, such as understanding new software updates, troubleshooting Internet loss or filtering out website ads.
“If you’re doing that for years and you’re really engaging with it, even though you might experience frustration, that may be a sign of you exercising your brain,” he said. Social connection Technology also enables communication and engagement like never before, which can expand opportunities for connectivity. Video calls, emails and messaging apps help maintain social networks, especially for people who would not otherwise regularly see their family members.
“Now you can connect with families across generations,” Scullin said. “You not only can talk to them, you can see them. You can share pictures. You can exchange emails and it's all within a second or less. So that means there's a greater opportunity for decreasing loneliness.” Better social connectedness is a well-documented correlate of cognitive functioning in older adults, providing a link between decreased isolation from digital technologies and reduced risks of dementia.
Impact of “digital scaffolding” A dementia diagnosis is indicated in part when cognitive changes lead to a loss of independence with daily tasks. Tools such as digital reminders, GPS navigation and online banking allow older adults to remain independent despite cognitive difficulties through digital scaffolding.
According to the research article, this digital scaffold “facilitates better functional outcomes in older adults while general cognitive functioning declines.” Technologies can serve as a compensatory support system to maintain general independence and reduce the risk of a dementia diagnosis even with the presence of some cognitive decline.
“As clinical practice continues to move toward an individualized, precision-medicine approach, it will be necessary for the field to identify for whom and for how long, such digital scaffolding is effective,” the researchers said. Promoting healthy technology use While Scullin recognizes the negative effects of technology, such as distracted driving or using technology over consistent face-to-face interaction, he also emphasizes how promoting a healthy use of digital tools in older adults is beneficial for their cognitive health.
“If you have a parent or grandparent who’s just staying away from technology, maybe revisit that. Could they learn to use photo, messaging, or calendar apps on a smartphone or tablet? Start simple and be very patient while they learn,” he said. Social media use is another highly debated topic in terms of cognitive effects. While he says it’s hard to predict the cognitive effects of endlessly scrolling on TikTok, Scullin does argue that generating videos through creative cognition could be beneficial. In addition, he said that interacting with communities online can provide benefits by forming social connections.
“We could spend a long time talking about all the specific ways in which technology use can be bad. However, the net effect since the 1990s has been positive for overall cognition in older adults,” he said. FUNDING The study was supported by funding from the National Institutes of Health (R01AG082783; M.K.S., J.F.B.).
Michael Scullin was named Baylor’s inaugural Newsmaker of the Year in 2018, after his “to-do list” research was widely covered by media outlets, including ABC’s Good Morning America, TODAY.com, USA TODAY, Discover, LiveScience, HealthDay, BBC Radio and many more, reaching an international circulation and viewership of nearly 1 billion people.
Looking to interview or chat with Michael Scullin? Simply click on his icon now to arrange an interview today.
Daylight saving time, with its one-hour spring forward at 2 a.m. Sunday, March 12, may seem like a small shift of just a single hour, but on a societal level, it has startling effects, says Baylor University sleep researcher Michael Scullin, Ph.D., associate professor of psychology and neuroscience and director of the Sleep Neuroscience and Cognition Laboratory at Baylor. So what are the consequences of this one-hour time shift on our sleep quality and how can we quickly adjust when springing our clocks forward?
"Many people not only lose that single hour of sleep," Scullin said, "but also have difficulty over several subsequent nights adjusting their circadian rhythms to the new bed-wake time schedules." For example, parents who have routine bedtimes for their children experience difficulty for the whole family because children will not want to (or be able to) go to bed one hour earlier than their body is used to.
"When you couple this bedtime difficulty with the fact that most people have morning school and work schedules that require them to wake up at a set time," Scullin said, "it becomes clear that ‘springing forward’ has a larger consequence than skipping a single hour." The consequences of the spring daylight saving time shift are well documented. Researchers have observed changes in cognitive functioning, increased driving accidents, moodiness and willingness to punish others for mistakes.
"Researchers have also documented that acute sleep loss and circadian dysregulation lead to an increase in cardiovascular events," Scullin said. "If someone's cardiovascular health is ‘borderline’ then the springtime shift can be the factor that precipitates a stroke or a myocardial infarction (heart attack)." Scullin offers some simple suggestions to anticipate and adapt to the spring forward shift:
Adjust in advance. About a week before the "spring forward," go to bed 15 or 20 minutes earlier each day. Avoid long naps during the day. If you need a nap, take it earlier in the day and for no more than 20 minutes. Bring on the sunlight. Getting more natural sunlight in the morning hours is very beneficial in resetting our biological clock. In some cases, evening melatonin also can help people to adapt to the time change. Scullin has published numerous studies focusing on sleep and brain function, including the connection between sleep and creativity, musical “earworms” and their effect on sleep and how writing a to-do list before you turn in for the night can help you get better sleep. In fact, Scullin was named Baylor’s inaugural Newsmaker of the Year in 2018, after his “to-do list” research was widely covered by media outlets, including ABC’s Good Morning America, TODAY.com, USA TODAY, Discover, LiveScience, HealthDay, BBC Radio and many more, reaching an international circulation and viewership of nearly 1 billion people.
Looking to interview or chat with Michael Scullin? Simply click on his icon now to arrange an interview today.
