PISA 2018: „On average 26 % of students reported that they spend more than six hours per day on line during weekends, and 16 % spend a similar amount of time on line during weekdays. And in most participating countries, extreme Internet use – more than six hours per day – has a negative relationship with students’ life satisfaction.“
OECD (Hrsg.), Learning from the Past, Looking for the Future (2021), S. 39.