„[…] there was a dose-response association between longer screen time at age 1 year and developmental delays in communication and problem-solving at ages 2 and 4 years. In particular, more than 4 hours of screen time per day was associated with developmental delays in communication and problem-solving across ages 2 and 4 years.“
Ippei Takahashi, MMSc u. a., Screen Time at Age 1 Year and Communication and Problem-Solving Developmental Delay at 2 and 4 Years. In: JAMA Pediatrics 2023, 177(10), S. 1043.