Teens 'not damaged by screen time', new Oxford study finds

Research by Oxford University scientists finds “little evidence of a relationship between screen time and wellbeing in adolescents.” Based on data from over 17,000 teenagers, the study “casts doubt on the widely accepted notion that spending time online, gaming or watching TV, especially before bedtime, can damage young people’s mental health.”
This isn't the first time a scientific study has disproven the notion of a direct link between the amount of time teenagers spend on devices and their well-being, but it's good to know we can worry less about teens' time on-screen.
The new Oxford University study is titled “Screens, Teens, and Psychological Well-Being: Evidence From Three Time-Use-Diary Studies,” and you can read the full text here.
Looking at your phone before bedtime, being online, gaming, watching TV -- none of these ways of spending time on-screen is damaging young people's mental health, the study authors said.
They question the methodology of previous studies.
'While psychological science can be a powerful tool for understanding the link between screen use and adolescent wellbeing, it still routinely fails to supply stakeholders and the public with high-quality, transparent and objective investigations into growing concerns about digital technologies,' said Professor Andrew Przybylski, Director of Research at the Oxford Internet Institute (OII) and co-author of the study.
From the BBC News recap:

The Oxford University study used data from three countries - the UK, US and Ireland - and 17,000 adolescents, and used both self-reporting and time-diary techniques (which ask teens to record what they are doing at specific times of day).
This data was not collected by the authors but culled from previous studies, dated between 2011 and 2016.
The authors said that often relying on self-reporting alone, as some previous studies have done, is dangerous because heavy users often under-estimate and infrequent users over-estimate the amount of time they spent online on any given day.
Co-author Amy Orben said it was important that studies were robust and asked the right questions: 'Because technologies are embedded in our social and professional lives, research concerning digital screen use and its effects on adolescent wellbeing is under increasing scrutiny,'
The rest of the BBC News article has a good recap of studies which have found links between screen time and health.