Author Interviews, Cognitive Issues, Karolinski Institute, Pediatrics / 18.12.2025
Karolinska Institutet Finds Children with Higher Social Media Use Showed Gradual Increase in Inattention Symptoms
MedicalResearch.com Interview with:
Samson Nivins PhD
Postdoctoral Researcher, specializing in Perinatal and Pediatric Neurology
[caption id="attachment_71834" align="alignleft" width="92"] Dr. Klingberg[/caption]
Torkel Klingberg, M.D., Ph.D.
Professor of Cognitive Neuroscience at the Stockholm Brain Institute
Karolinska Institutet, Stockholm Sweden
MedicalResearch.com: What is the background for this study?
Response: In the modern era, children’s use of digital media such as watching videos, playing video games, and using social media has increased substantially, often coinciding with a decline in outdoor activities. As many school-aged children now own personal devices, particularly smartphones, it has become easier for them to spend more time on screens than intended. For example, a German survey cited in an EU briefing reported that in 2020, 27% of 8-9-year-olds and 54% of 10-11-year-olds owned a smartphone. In the U.S., ~30% of children own a smartphone by age eight, with many receiving their first device between ages 10 and 11.
With growing concerns about screen time, numerous studies have examined its potential consequences and have reported associations between higher screen use and increased ADHD symptoms. However, most of this research has been cross-sectional and has tended to combine different types of digital media such as television, video games, and social media into a single composite measure. This approach may obscure important differences, as various forms of digital media may have distinct effects on ADHD symptoms. To date, relatively few studies have examined the impact of specific types of digital media use on ADHD in a longitudinal framework, and even fewer have accounted for the heritable nature of ADHD.
To address these gaps, this U.S. longitudinal study followed children from ages 9-10 to 13-14 years. The study collected repeated measures of daily time spent on specific digital activities, including television and videos, video games, and social media platforms such as TikTok, Instagram, and Facebook. ADHD symptoms specifically inattention and hyperactivity/impulsivity were assessed using parent reports, and analyses adjusted for genetic factors and socioeconomic status.
Samson Nivins PhD
Postdoctoral Researcher, specializing in Perinatal and Pediatric Neurology
[caption id="attachment_71834" align="alignleft" width="92"] Dr. Klingberg[/caption]
Torkel Klingberg, M.D., Ph.D.
Professor of Cognitive Neuroscience at the Stockholm Brain Institute
Karolinska Institutet, Stockholm Sweden
MedicalResearch.com: What is the background for this study?
Response: In the modern era, children’s use of digital media such as watching videos, playing video games, and using social media has increased substantially, often coinciding with a decline in outdoor activities. As many school-aged children now own personal devices, particularly smartphones, it has become easier for them to spend more time on screens than intended. For example, a German survey cited in an EU briefing reported that in 2020, 27% of 8-9-year-olds and 54% of 10-11-year-olds owned a smartphone. In the U.S., ~30% of children own a smartphone by age eight, with many receiving their first device between ages 10 and 11.
With growing concerns about screen time, numerous studies have examined its potential consequences and have reported associations between higher screen use and increased ADHD symptoms. However, most of this research has been cross-sectional and has tended to combine different types of digital media such as television, video games, and social media into a single composite measure. This approach may obscure important differences, as various forms of digital media may have distinct effects on ADHD symptoms. To date, relatively few studies have examined the impact of specific types of digital media use on ADHD in a longitudinal framework, and even fewer have accounted for the heritable nature of ADHD.
To address these gaps, this U.S. longitudinal study followed children from ages 9-10 to 13-14 years. The study collected repeated measures of daily time spent on specific digital activities, including television and videos, video games, and social media platforms such as TikTok, Instagram, and Facebook. ADHD symptoms specifically inattention and hyperactivity/impulsivity were assessed using parent reports, and analyses adjusted for genetic factors and socioeconomic status.
Dr. Halpern-Felsher[/caption]
Bonnie Halpern-Felsher, PhD, FSAHM (pronouns: she/her)
Professor of Pediatrics
Taube Endowed Research Faculty Scholar
Professor (by courtesy), Epidemiology and Population Health
Professor (by courtesy), Psychiatry and Behavioral Sciences
Director of Fellows’ Scholarship, Department of Pediatrics
Director of Research, Division of Adolescent Medicine
Co-leader, Scholarly Concentrations, Pediatrics Residency Program
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: To examine adolescent and young adult e-cigarette use during the COVID-19 pandemic.
There were 4 main findings:
Dr. Ganson[/caption]
Kyle T. Ganson, PhD, MSW
Assistant Professor, Factor-Inwentash Faculty of Social Work
University of Toronto
Toronto, Canada
[caption id="attachment_55902" align="alignleft" width="132"]
Dr. Nagata[/caption]
Jason Nagata, MD, MSc
Assistant Professor of Pediatrics
University of California, San Francisco
San Francisco, California, USA
MedicalResearch.com: What is the background for this study?
Response: A quarter of young adults in the US have reported being unemployed during the COVID-19 pandemic. Young adults may be especially affected by employment loss as they often work in industries most adversely affected by social distancing.
MedicalResearch.com: What are the main findings?
Response: Among a sample of nearly 5,000 young adults age 18 to 26 in the US, we found that since March 2020, young adults who lost their job or were part of a household that experienced employment loss were more likely than those with secure employment to experience four common symptoms of anxiety and depression. This was also true of young adults who expected an employment loss in the next four weeks. The study also found that symptoms of anxiety and depression were common among the sample of young adults. In the seven days prior to the survey, 75% reported being nervous, anxious or on edge, 68% reported not being able to stop or control worrying, 67% reported having little interest or pleasure in doing things, and 64% reported feeling down, depressed, or hopeless.
Response: The background for this study involves the associations of household rules and parental awareness with youth tobacco use using data from the Population Assessment Tobacco and Health Study. Health concerns regarding non-cigarette tobacco products, specifically e-cigarettes, have been on the rise. We wanted to explore whether parents are up to date with the trends of popular tobacco products today and what role they may play in youth tobacco cessation and prevention.
The main findings of the study revealed that parents less often suspected their children’s tobacco use if their children reported using only e-cigarettes, and other non-cigarette tobacco products, when compared with cigarettes. Additionally, we found that youth who agreed with their parents that their home has strict rules for tobacco use were less likely to initiate of tobacco use compared to youth who had different understanding of the rules from their parents or youth from households with more permissive household rules. 
Dr. Miech[/caption]
Richard Miech Ph.D
Professor
Principal Investigator, Monitoring the Future
Institute for Social Research
University of Michigan
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: Every year Monitoring the Future conducts a survey to examine trends in adolescent substance use. We draw a random sample of schools from a list of all schools in the United States and conduct our survey in ~400 schools. Our survey is representative of U.S. 8th, 10th, and 12th grade students. In other words, our results are what you would find if you surveyed every single 8th, 10th, and 12th graders in the United States, within the bounds of a small sampling error of a few percentage points.
An increase in vaping is the big news for 2018. In 10th and 12th grade the increase in nicotine vaping was the largest we've ever seen for any substance in the past 43 years. As a result of this increase in nicotine vaping, overall use of nicotine increased as well, which suggests that vaping is drawing youth into nicotine use. We also saw a significant increase in marijuana vaping.