Is Screen Time Bad For Kid’s Brain Development? Study Points To Yes

Children today, unlike any previous generations, have nearly constant distractions from interacting with the real world, screen time.
screen time kids
Credit: Rawpixel.com / stock.adobe.com

While the impacts of screen use is a topic of widespread research, a recent study found that brain development in young children is negatively impacted by screen use.

The study, published in JAMA Pediatrics, combined MRI brain scans, surveys by parents on the child’s screen time use, and cognitive ability tests focused on literacy and language.

In total, 47 children from ages 3 to 5 years old were part of the survey. All children who took part in the survey are from English-speaking households and primarily middle to upper-middle class.

The study found a correlation between screen-based media in children and lower white matter integrity in those children’s brains. The lower integrity of white matter impacts language and literacy skills in children who are actively developing those skills.

mri screen time brain
MRI of white matter tracts showing lower structural integrity in children with increased screen time use. Credit: Cincinnati Children’s Hospital Medical Center

How Were The Children Assessed?

Beyond the use of MRI, parents filled out detailed surveys about their child’s screen use. This survey was scored against the ScreenQ test, created by the American Academy of Pediatrics.

aap screen time guidelines
Credit: American Academy of Pediatrics

The AAP recommends the following guidelines:

  • Children under the age of 18 should avoid screen time except for video-chatting.
  • From 18 to 24 months if the parents choose to allow screen time, it should be high-quality and parents should be involved with the experience.
  • From ages 2 to 5 screen time should be limited to 1 hour per day and high-quality. Again, parent’s should be involved with the viewing experience to talk through what they are watching.
  • Children 6 and older should be monitored so that screen time isn’t interrupting sleep, physical activity, mental or physical health, etc.
  • Children should not consume violent content.

ScreenQ scores ranged from 1 to 19 with an average of 9 in the study. The study found consistently lower measures of structural integrity and myelination in children with greater screen time use.

Is All Screen Time Equivalent?

While the study found a link between increased screen time and an impact on children’s development, it is important to note that all screen time is not created equally.

violent screen time
Violent media use is not recommended in children by the AAP.

The following factors, in part, impact the overall impact of screen time on brain development:

  • Passive versus active screen time.
  • Having a parent in the room explaining what is going on and starting conversations around what is on the screen.
  • Violent and fast-paced screen time can be overstimulating
  • Screen time before bed can lead to sleep interruption.

“In general, isolated, passive viewing is less constructive for children’s development,” said Dr. John Hutton, the first author of the study and director of the Reading & Literacy Discovery Center at Cincinnati Children’s Hospital.

Dr. Hutton added that “An issue with portable devices is that the screen follows the child everywhere, eliminating barriers to moderation. In general, few apps claiming to be “educational” have been studied; most of these are advertising claims that can be misleading especially for young children.”

Can Negative Impacts Of Screen Time In Children Be Reversed In Adulthood?

While brain plasticity extends through adulthood, it does decrease with age. Plasticity in the brain peaks in childhood, with 15,000 synapses per neuron in a 2 to 3-year-old child’s brain. From there, plasticity decreases with age, however, recent research points to learning and experiencing as important drivers in increasing the number of synapses in adults.

brain plasticity with age 1
How brain plasticity changes with age. See article: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6128435/

“It’s harder to “rewire” the brain with age, though possible.  As screen use tends to increase sharply with age, we would expect effects to compound over time,” said Dr. Hutton. “If foundations of language and related networks say, are under-developed, these can potentially be remediated with intensive language therapy (for example), but harder with age. It’s far easier to develop strong infrastructure, to begin with.”

Thus, it’s key to ensure experiences promoting cognitive development early in one’s life as it’s harder to change course later in one’s life. Similar to investing in retirement, starting early and often pays much higher dividends in the long run than starting later in life.

Does Screen Time Have A Similar Effect On Adult Brains?

As noted above, our brains develop and change as we grow and not surprisingly, the impact of screen time changes from children to adults.

The benefits and risks of screen time changes with age and also depends on the person’s environment. Screen time could negatively impact cognitive development in children, social interactions and self-confidence in teens, and sleep and work efficiency in adults.

“What someone gets out of screens – risks and benefits – changes with age.  For young children, these largely involve language and relationships, for adolescents, social media anxiety (e.g.), and for adults, distraction, multitasking, etc.” said Dr. Hutton “Sleep interference is a constant risk.  It’s hard to say what the effect with age will be – longitudinal studies are needed.”

As A Parent, How Can You Manage Screen Time?

You may feel lost, wanting your child to spend less time using media but unsure of exactly where to draw the line and how to introduce and implement a new screen time policy.

The American Academy of Pediatrics has a great tool that you can use to establish a family media plan. The tool helps to develop screen-free zones, screen-free times, a plan for curfews for device use, what types of media to use and its diversity, how to manage on and off-screen time, safety, the importance of sleep and exercise, etc.

aap family media plan

Overall, the tool is a great start to ask you the right questions that you should discuss as a family and develop a plan. It is important to consider implementing not just a screen time plan for your child but for the adults as well. This will help to adhere to the plan and positively impact the overall well-being of the family.

How do you manage your children’s screen time use? Leave a comment below to provide your tips on how you work through the hurdles of children today and the nearly constant distraction of media.

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