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The sound of a mobile phone ringing affects the complex reaction time of its owner.

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Zajdel R, Zajdel J, Zwolińska A, Smigielski J, Beling P, Cegliński T, Nowak D. · 2012

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Even the sound of your ringing phone slows reaction time by 36 milliseconds, potentially impacting safety during driving or other complex tasks.

Plain English Summary

Summary written for general audiences

Researchers tested 42 healthy students' reaction times while performing complex tasks, comparing their performance when their personal mobile phone was ringing versus when it was silent. They found that the phone's ringing sound significantly slowed reaction times by about 36 milliseconds (from 597ms to 633ms), with women showing greater impairment than men. This suggests that even the sound of a ringing phone can distract the brain enough to measurably affect cognitive performance.

Why This Matters

This study reveals an often-overlooked aspect of how mobile phones affect our cognitive function. While most EMF research focuses on the biological effects of electromagnetic radiation itself, this Polish research demonstrates that even the auditory component of phone use impairs brain performance. The 36-millisecond delay may seem small, but reaction time differences of this magnitude can be the difference between avoiding an accident and causing one. What makes this research particularly relevant is that it measured effects from participants' own phones, meaning the ringtone was familiar yet still disruptive. The science demonstrates that our brains are constantly processing multiple streams of information, and mobile phone sounds represent a significant cognitive load that degrades our ability to perform complex tasks requiring attention and quick responses.

Exposure Information

Specific exposure levels were not quantified in this study.

Study Details

We compared a subject's reaction time while performing a test either with a mobile phone ringing or without

The examination was performed on a PC-based reaction time self-constructed system Reactor. The study...

There were significant differences (p < 0.001) in reaction time in control (597 ms), mobile (633 ms)...

The results obtained proofed the ringing of a phone exerts a significant influence on complex reaction time and quality of performed task.

Cite This Study
Zajdel R, Zajdel J, Zwolińska A, Smigielski J, Beling P, Cegliński T, Nowak D. (2012). The sound of a mobile phone ringing affects the complex reaction time of its owner. Arch Med Sci.8(5):892-898, 2012.
Show BibTeX
@article{r_2012_the_sound_of_a_2697,
  author = {Zajdel R and Zajdel J and Zwolińska A and Smigielski J and Beling P and Cegliński T and Nowak D.},
  title = {The sound of a mobile phone ringing affects the complex reaction time of its owner.},
  year = {2012},
  
  url = {https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3506222/},
}

Quick Questions About This Study

Yes, phone ringing sounds can significantly slow your reaction time. A 2012 study found that hearing your personal mobile phone ring increased reaction times by 36 milliseconds during complex tasks, suggesting auditory phone alerts create measurable cognitive distraction that impairs performance.
Mobile phone ringing does impact brain function by creating cognitive distraction. Research on 42 students showed that phone ringing sounds significantly slowed complex reaction times compared to silent conditions, with women experiencing greater impairment than men during cognitive tasks.
Yes, women appear more affected by phone distractions than men. The 2012 study found women showed significantly longer reaction times when phones were ringing (657ms vs 573ms for men), suggesting gender differences in how auditory phone alerts impact cognitive performance.
Phone ringing slows reaction time by approximately 36 milliseconds during complex tasks. This represents about a 6% increase from baseline performance (597ms to 633ms), which researchers found statistically significant and potentially meaningful for activities requiring quick responses.
Phone ringing is bad for concentration and cognitive performance. A controlled study demonstrated that even hearing your personal phone ring creates measurable distraction, significantly slowing reaction times during complex mental tasks compared to silent conditions.