www.sciencedirect.com/science/article/pii/S2451958821000622#:~:text=The%20greater%20the%20use%20of,the%20negative%20impact%20on%20learning.&text=The%20skills%20and%20cognitive%20abilities,affected%20by%20excessive%20phone%20use.
Negative correlation among college students. I'd guess it's even worse for school age children. Scools usually forbid phone use withon school, however important socialisation goes on outside of school.
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