"The babies' stress reactions during smartphone use were comparable to those in the 'still-face' situation—that is, intentional ignoring." https://www.pmu.ac.at

"The babies' stress reactions during smartphone use were comparable to those in the 'still-face' situation—that is, intentional ignoring." https://www.pmu.ac.at/aktuelles/detail/wenn-das-smartphone-dazwischenkommt-unsere-aktuelle-studie-smartbaby-zeigt-was-bei-mama-und-baby-passiert https://www.pmu.ac.at/aktuelles/detail/wenn-das-smartphone-d...