New Study Links Kids’ Screen Time to Sleep and Behavioral Difficulties

For parents trying to decide how much screen time is too much, a new study offers another reason to pay attention not only to how long children spend on screens, but also to how screen use fits into their daily routines.

A 2026 study published in Pediatric Reports examined reading habits, screen time, sleep difficulties, and behavioral difficulties among 1,551 children and adolescents between the ages of 6 and 18. The researchers found that children who spent more time on screens also tended to experience more sleep difficulties. Among older children and teenagers, higher screen time was also associated with more behavioral difficulties.

The findings add to a growing body of research suggesting that families may benefit from deliberately creating parts of the day that don't revolve around phones, tablets, televisions, computers, or other screens.

What Did the Researchers Study?

The research, titled “Reading and Screen Time: Associations with Behavioral and Sleep Difficulties in Children and Adolescents,” was conducted as part of the LIFE Child study in Germany and published in August 2026.

Researchers divided participants into two groups:

• 579 children ages 6 to 10.5
• 972 children and adolescents ages 10.5 to 18

For younger children, parents provided information about their children's habits. Older children and adolescents reported their own behaviors.

Researchers looked at several factors, including:

• Daily screen time
• Time spent reading
• Reading on paper or electronically
• Sleep difficulties
• Behavioral difficulties
• Age
• Sex
• Maternal education

The researchers then analyzed how these factors were associated with one another.

More Screen Time Was Associated With More Sleep Difficulties

One of the clearest findings involved screen time and sleep.

Higher daily screen time was significantly associated with greater sleep difficulties in both younger and older children.

Screen use also increased as children got older.

That matters because sleep plays an important role throughout childhood and adolescence. Poor sleep can affect everything from a child's ability to concentrate at school to mood, energy levels, and family routines.

The study does not prove that screens directly caused the sleep difficulties. It demonstrates an association, meaning children reporting more screen use were also more likely to report sleep problems.

That distinction is important. A child who already has trouble sleeping, for example, might spend more time using a device. Screen use could also be one of several factors contributing to sleep difficulties.

Still, the relationship gives parents another reason to look carefully at when and how screens are being used, particularly as children get older.

Screen Time Was Also Connected to Behavioral Difficulties in Older Kids

The researchers found another age-related difference.

Among the younger children, screen time was associated with sleep difficulties but was not significantly associated with behavioral difficulties.

Among children and adolescents ages 10.5 to 18, however, higher screen time was associated with both greater sleep difficulties and greater behavioral difficulties.

This doesn't mean that a phone or tablet automatically causes behavioral problems. The study wasn't designed to establish cause and effect.

Instead, it shows that screen habits, sleep, and behavioral health appear to become increasingly intertwined as children move toward adolescence.

That makes the older years particularly important for helping children develop healthy media habits rather than simply imposing limits.

Boys Reported More Screen Time, While Girls Read More

Researchers also found differences between boys and girls.

Girls reported spending more time reading, while boys reported more daily screen time. Screen time increased with age for both groups.

The findings reinforce something most parents already experience firsthand: children's media habits change substantially as they grow.

Managing screen time for a six-year-old is very different from managing it for a 16-year-old who may use a computer for homework, a phone for socializing, streaming services for entertainment, and gaming devices for recreation.

Simply counting minutes may therefore tell only part of the story.

The Study Found Something Surprising About Reading

One of the more interesting findings involved reading.

For children ages 6 to 10.5, researchers found no significant association between reading time and screen time, sleep difficulties, or behavioral difficulties.

In other words, spending more time reading was not associated with the same problems seen with screen use in this younger group.

The results became more complicated among older children and teenagers.

In the older group, longer reading time was associated with longer screen time, more behavioral difficulties, and greater sleep difficulties.

That does not mean reading is harmful.

Because the research examines associations, it cannot determine why these behaviors occur together or which comes first. The researchers themselves conclude that recommendations for older children should consider the balance and context of reading activities, rather than treating every type of sedentary activity in the same way.

It's also worth remembering that the researchers measured reading whether it took place on paper or electronically.

The takeaway isn't "less reading." It's that parents may need to look at a child's entire daily routine.

Screen Time Isn't Just About a Number

One of the most useful implications of the study is that conversations about children's screen time may need to move beyond a single daily limit.

Parents can also ask:

When is the screen being used?

Screens used immediately before bed may affect a child's routine differently from devices used earlier in the day.

What is the child doing on the screen?

Homework, video chatting with Grandma, scrolling social media, watching videos, and playing an online game are very different activities.

What is screen time replacing?

A screen becomes more concerning when it consistently pushes aside sleep, physical activity, conversation, imaginative play, reading, or family interaction.

Can some activities be moved offline?

Not every activity needs a digital equivalent. Books, games, crafts, outdoor activities, storytelling, and face-to-face conversation can create natural periods during the day when screens simply aren't necessary.

Creating More Screen-Free Reading Time

Reading remains one of the simplest ways to build screen-free time into a child's routine, particularly for younger children.

A bedtime story doesn't require a tablet. Neither does a trip to the library, looking through a favorite picture book, or hearing the same story for what may feel like the 500th time.

For families separated by work schedules, travel, military service, divorce, or distance, screen-free storytime can be harder.

That's one reason we created the Read To Me Recordable Book Buddy.

The Recordable Book Buddy attaches to the back cover of virtually any children's picture book and lets a parent, grandparent, or other loved one record the story page by page. A child presses the corresponding button while reading to hear that person's voice.

There are no apps, no Wi-Fi, and no screen, allowing families to maintain the personal connection of reading together even when they can't physically be in the same room.

It's available in over 140 independent bookstores and online.

What Parents Can Take Away From the Research

There is no need for parents to treat every screen as the enemy.

Screens are firmly embedded in childhood, education, communication, and entertainment. Trying to eliminate them entirely isn't realistic for most families.

Instead, the new research supports a more practical goal: create balance deliberately.

Protect sleep. Make room for books. Encourage activities that don't require devices. Pay attention when screen use begins replacing other important parts of childhood.

And perhaps most importantly, don't wait until adolescence to start.

The study found that daily screen time increased as children grew older. Establishing screen-free routines while children are young may make it easier for those routines to remain part of family life as screens become increasingly difficult to avoid.

Sometimes the simplest alternative is still one of the best:

Put down the screen, pick up a book, and share a story.

About the Study

The research discussed in this article is “Reading and Screen Time: Associations with Behavioral and Sleep Difficulties in Children and Adolescents,” by Henrike Waterstrat, Nico Grafe, Wieland Kiess, Andreas Merkenschlager, and Tanja Poulain. It was published in Pediatric Reports, Volume 18, Issue 4, in August 2026, as part of the special issue The Developing Child: Integrating Emotional and Physical Health.