„A study carried out in 91 schools in England among children aged 11–16 found that banning mobile phones had a positive effect on their standardized test scores. What’s more, the effect was strongest for low-performing students and absent for the best-performing, which suggests that technology in some cases can have a negative effect on low-achieving students.“
UNICEF (Hrsg.), „Children in a Digital World“ (2017), S. 22