Cal Newport asks if smartphones make us dumber, and shares the results from a 2017 study…
Subjects measured notably lower on working memory capacity and fluid intelligence when the phone was next to them on the desk versus out of sight. This was true even though in all the cases the subjects didn’t actually use their phones.
The mere presence of the device, in other words, sapped cognitive resources.
Given that, if you want to improve your focus and get more work done, keep your phone out of sight 🙈