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Endless smartphone scrolling may be linked to poorer attention, memory performance and sleep—but a study of students does not show that scrolling caused those outcomes. Semmelweis University researchers found that the kind of phone use mattered: students who mainly consumed content, rather than communicating, performed worse on attention and memory tasks than expected for their age and reported poorer sleep.
What the study found about heavy smartphone use
In a report published January 21, 2026, Semmelweis University described a study of students aged 18 to 35. The researchers grouped participants by how they used their phones, then compared those patterns with questionnaire responses, cognitive tasks and physical measurements. About one third of participants were classified as heavy-process users, according to the university; it did not publish the denominator alongside that figure.
Heavy-process users mainly consumed phone content instead of communicating directly. They performed worse on attention and memory tasks than expected for their age. They also reported poorer sleep, a stronger desire for continuous stimulation, and more difficulty resisting impulses to check their phones or act immediately. These are associations, not evidence that scrolling itself caused cognitive differences or sleep problems.
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1Repair Windows errors before they cause bigger problems2Fix the driver behind crashes, sound loss and screen glitches3Clear out junk files and repair common Windows errorsHow the researchers classified phone habits
The university described three patterns of smartphone use. These are categories from the study, not a consumer test or a universal threshold for harm.
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| Pattern | How the university described it |
|---|---|
| Pure social | Mainly used phones to communicate and maintain social connections. |
| Light process | Combined social activity with news, entertainment and passive scrolling, using a phone for less than four to five hours a day. |
| Heavy process | Mainly consumed content rather than communicating directly, using a phone for four to five hours or more a day. |
Participants also completed online questionnaires about their active phone use, what they did on their phones, whether phone use caused them to miss planned tasks, and whether they thought about their phones when they were not using them. The researchers assessed neuroticism, self-control and fear of missing out (FoMO).
Does scrolling cause memory or attention problems?
The available reports do not establish cause and effect. They describe a relationship between a content-focused pattern of use and poorer performance on attention and memory tasks; they do not show that scrolling damaged participants’ memory or attention. The accessible reports do not disclose the participant count, recruitment details, study-design terminology, effect estimates, confidence intervals or detailed cognitive test instruments, so the size and precision of the reported differences cannot be assessed from them.
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The findings apply to the students aged 18 to 35 described by the university, not automatically to children, older adults or all smartphone users. Nor does the four-to-five-hour division establish a point at which every user will experience a problem. The researchers compared patterns that included both activity type and duration; the reports do not establish a universal safe-use cutoff.
Why self-control and FoMO matter
The study’s account connects problematic smartphone use with weaker self-control and fear of missing out. Its lead researcher, Dr. Johanna Takács, cautioned against treating personality or negative emotions alone as an explanation: people prone to anxiety, depression or stress do not automatically become addicted to their phones. How someone manages behavior, emotions and impulses—and how strongly they fear missing out—also matters.
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That distinction is useful because frequent phone use and problematic use are not identical. The university’s report discusses missed tasks, thoughts about the phone while not using it and difficulty resisting the urge to check as relevant features; hours alone do not capture those experiences.
What the study says about posture and physical concerns
The university distinguishes cognitive associations with phone-use type from physical concerns it relates more closely to duration. Beáta Seregély, the expert responsible for physical measurements, described looking down at a phone held around waist or chest level as a forward-head posture, sometimes called “text neck.” The report says sustained posture may add strain to the neck and may affect balance signals, but it does not provide effect sizes or detailed measurement results. These explanations should not be read as quantified proof that phone use causes neck injury or balance problems.
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A stand that raises a phone closer to eye level is a practical option for changing viewing posture, but the study did not test stands. The reports do not show that using one prevents pain, balance problems, sleep disruption or cognitive effects.
Practical ways to make phone use more deliberate
Semmelweis University says the aim is not to ban phones. Its suggestions are ways to reduce unnecessary checking and support healthier routines; this study did not test them as treatments or prove that they prevent a condition.
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- Turn off notifications that do not need an immediate response.
- Set limits for social-media use to make passive scrolling easier to notice and interrupt.
- Avoid using a phone before bedtime, as the university recommends.
- Pay attention to posture while looking at a phone and take opportunities to move and be physically active.
- Consider whether pressure to remain constantly connected or fear of missing out is driving repeated checks.
Study and reporting details
The university’s account was published January 21, 2026. The underlying paper is Johanna Takács and Beáta Seregély, “Parallel mediation of FoMO and self-control on the relationship between problematic smartphone use and neuroticism, at-risk group’s characteristics among young adults,” published in Acta Psychologica in 2025, volume 260, article 105608, DOI 10.1016/j.actpsy.2025.105608. A ScienceDaily story about the findings was published October 12, 2026.
Read the Semmelweis University report and the ScienceDaily coverage for the source accounts.
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