Part 2 of a two-part series on the challenges of screen time and technology advances; Part 1 looked at the parenting challenges of managing technology and AI for kids
With headlines constantly warning about the effects of screen time on children and teens, it’s easy to assume the real concern is younger brains. So we set limits for the grandkids and gently nudge teens off their phones. However, grown-up brains aren’t immune. Excessive screen time affects adults, too. Here’s what screen time really does to the adult brain — and how to tell the difference between the kind that drains you and the kind that can actually support your well-being.
Read: More helpful health stories
Discover: Stories about family
Screen Time in Older Adults
When we talk about screen time, we’re not just talking about scrolling on a smartphone. Laptops, tablets, and even long stretches in front of the television all count. Since work, errands, and even staying in touch now happen through screens, it’s understandable that stepping away becomes surprisingly hard — not just for teens.
According to a 2022 Gallup poll, nearly 6 in 10 (58%) of adults in the United States believe they’re using their phones too much — up from 39% in 2015. And research suggests adults in their 50s now average roughly 20–25 hours per week of total screen time across devices.
But while how much time you spend scrolling or watching matters, research increasingly suggests what you’re doing on that screen may matter even more.
Good Vs. Bad Screen Time
Studies in older adults consistently show a distinction between passive and active screen use.
Passive Screen Time
Passive screen time involves consuming content with minimal cognitive effort. It’s primarily receptive, with low decision-making demands, minimal working memory use, and little novelty. Think traditional linear TV watching. There’s little input beyond choosing a channel or episode. It’s often used as background noise or default filler, tends to run in long, uninterrupted stretches, and lacks social reciprocity.
“Passive screen time is like eating sugar but for your brain. It ‘tastes’ good, and you want it now, but you’re not actually feeding yourself. You’re not giving your brain any nutrition,” Maris Loeffler, a family and marriage therapist told Stanford Lifestyle Medicine blog.
This form of screen time includes:
- Linear television watching
- “Background TV”
- Habitual streaming binges
- Low-effort social media browsing
In these scenarios, you’re bombarded with rapid sensory stimulation without being required to think critically, respond, engage, or create.
“Passive screen time is like eating sugar but for your brain. It ‘tastes’ good, and you want it now, but you’re not actually feeding yourself. You’re not giving your brain any nutrition.” — Maris Loeffler, a family and marriage therapist
Active Screen Time
Active screen time requires purposeful input. You’re typing, navigating, problem-solving, or learning. The activity has a goal: communicating, scheduling, researching, creating, or managing health.
Instead of simply choosing to continue or stop, the task often progresses or adapts. There’s frequent social reciprocity (messaging, video calls, group sessions) and sustained cognitive demands such as decision-making and critical thinking.
For example, even running a quick ChatGPT query requires you to read, evaluate whether it answered your question, and refine your prompt if needed. The same goes for thoughtfully responding to a social media post. You consider what to say and how to frame it.
In active screen use, you’re not just absorbing content; you’re processing and responding. Other examples of active screen time include:
- Internet searching and browsing for information
- Brain-training games and apps (e.g., speed-of-processing tasks, puzzles)
- Social media participation (posting, commenting, messaging)
- Video calling with family and friends
- “Exergames” combining physical movement with cognitive tasks
- Creative activities such as digital art, writing, or photo editing
- Learning new digital skills (using tablets, smartphones, new software)
The Harm of Television
When researchers study passive screen time, television consistently stands out.
One study found that people who watched more TV experienced greater brain shrinkage. While earlier research has shown that regular exercise can slow cognitive decline, this study found that those who watched above-average amounts of TV still showed reductions — even if they exercised regularly.
“It would suggest that just becoming more physically active alone is not going to negate the negative effects associated with television viewing,” Ryan Dougherty, a postdoctoral fellow in the Johns Hopkins Bloomberg School of Public Health.
Similarly, a longitudinal study showed that adults who watched more than 3.5 hours of TV per day experienced faster verbal memory decline over six years — even after accounting for health, depression, and other sedentary behaviors.
A large UK Biobank study of more than 146,000 adults aged 60+ found that higher TV time was associated with a 24% increased risk of dementia. Notably, computer use did not show the same risk. A recent meta-analysis found cognitive risk rose noticeably around four hours of TV per day.
Why might TV be different? It puts the brain in an “alert-passive” state: stimulated but not actively engaged. Over time, that low-demand pattern may weaken memory encoding. Television also tends to replace movement, conversation, and mentally enriching activities — all important for brain health.
Why Active Screen Time Is Ideal
The key difference is engagement. A 2025 meta-analysis of more than 400,000 adults found that everyday digital technology use, including computers, internet, and smartphones, was associated with lower risk of cognitive impairment and slower decline.
Teaching older adults to use tablets has also led to measurable gains in processing speed and episodic memory compared to passive activities. Even something as simple as internet searching activates brain regions involved in reasoning and decision-making, and brief training has been shown to strengthen frontal brain networks.
Technology may also support emotional health. Studies have shown reductions in loneliness and depressive symptoms when older adults use digital tools for connection and telehealth. In short, when screen time involves learning, interaction, and purpose, it can stimulate the brain rather than slowly dull it.
The Nuance
Active screen time isn’t automatically protective. Total sedentary time still matters, even if the activity is cognitively engaging. Long, uninterrupted sitting has been linked to increased dementia risk. Bedtime screen use can disrupt sleep, and fragmented sleep affects memory and mood. Constant multitasking, jumping between tabs, apps, and alerts, can also fragment attention and leave you mentally fatigued.
Digital life comes with stressors too, from misinformation to scams. The goal isn’t simply more screen time — but better screen time.
Screens themselves aren’t the problem. The difference lies in how you use them — and quality may matter more than sheer quantity. Used intentionally, they can challenge your mind, strengthen connections, and even support healthy aging.
More from Nifty50+
- Want to be a better spouse? Get an exercise routine
- Why weight fluctuations matter in aging adults
- Just how long is “long” for long-term health care?
- Biohacking for Active Aging: Top Wearables Explored