Screens, monitors, and displays have become an integral part of our daily lives. They are indispensable for work, learning, and leisure. We use screens to enrich our lives in countless ways. However, prolonged exposure to screens can harm cognitive abilities.
A team of researchers from Macquarie University and the Australian Catholic University reached that conclusion. In a meta-analysis of dozens of previous studies, the researchers found a clear link between extended screen use and impaired cognitive function.
Young People Are Spending More Time in Front of Screens
A recent survey of Australian teachers found that excessive screen time is the second most significant issue facing young people, after mental health concerns.
The surge in screen use has created a persistent dependency among children, teenagers, and adults. Studies link screen exposure to declines in attention, memory, language, and problem-solving skills.
This has sparked considerable debate. On one hand, indiscriminate screen use can have detrimental health effects. On the other hand, schools are increasingly integrating screen-based technologies, as reported by Science Alert.
What the Research Revealed
The scientists conducted a meta-analysis of 34 studies examining various forms of screen use, including gaming, social media, online news consumption, and smartphone use. They compared the cognitive abilities of two groups of participants: people who used screens excessively and those who did not. The findings were concerning.
Across the studies, people in the heavy-use group showed significantly lower cognitive performance than those in the low-use group. The most affected area was attention, particularly sustained attention (the ability to maintain focus on an unchanging stimulus over an extended period).
Heavy screen users also showed a decline in impulse control, meaning a reduced ability to manage automatic reactions.
The type of screen did not influence these results. The trend appeared across all age groups.
So, Why Is Sitting in Front of Screens So Dangerous for the Mind?
Indiscriminate screen use leads to diminished attention. Distractions from screens weaken a person’s ability to concentrate. Michoel Moshel, a neuropsychologist at Macquarie University and the study’s lead author, says attention impairment also makes it harder to recognize when screen use becomes a genuine problem.
Attention is a crucial mental function for completing everyday tasks. People with weakened attention struggle to keep up with others, whether at work or in the classroom.
People who already have impaired cognitive function are more likely to continue using screens indiscriminately.
