You're at dinner with someone. Your phone is next to your plate. Face down. On silent.
That's your way of saying: you have my full attention.
You even feel a little proud. It can't interrupt you. You don't have to think about it. This is what respect looks like.
Wrong.
Researchers at the University of Texas put that to the test. Nearly 800 people took tests that needed full attention.
They were split into three groups. The first put their phones face down on the desk. The second kept them in a pocket or bag. The third left them in another room. Every phone was on silent.
The people with phones in another room did best. The ones with phones on the desk did worst. Pocket or bag sat in the middle.
Face up or face down didn't matter. Even switched off didn't matter. Having it nearby was enough.
The researchers called it a brain drain. Your conscious mind isn't thinking about the phone. Part of you is busy not thinking about it. That costs something.
A later study in Germany put the same idea through a simpler test. Forty-two students took a timed attention task. Half kept a switched-off phone face down on the desk. Half put it in another room.
The group without the phone scored higher. They also worked faster. Same accuracy. Just more done.
Covering the screen wasn't enough. Switching it off wasn't enough. Another room was.
Picture a guest at your table who never speaks. You don't look at them. You don't talk to them. But you feel them there. Part of your attention stays reserved, just in case.
Your phone can do that without ringing once.
The phone on the desk is still in the meeting.
References
- Ward, A. F., Duke, K., Gneezy, A., & Bos, M. W. (2017). Brain drain: The mere presence of one's own smartphone reduces available cognitive capacity. Journal of the Association for Consumer Research, 2(2), 140-154. https://doi.org/10.1086/691462
- University of Texas at Austin. (2017). The mere presence of your smartphone reduces brain power, study shows. UT News. https://news.utexas.edu/2017/06/26/the-mere-presence-of-your-smartphone-reduces-brain-power/
- Skowronek, J., Seifert, A., & Lindberg, S. (2023). The mere presence of a smartphone reduces basal attentional performance. Scientific Reports, 13, 9363. https://doi.org/10.1038/s41598-023-36256-4
