Tech writer Andy Ihnatko joined Boston Public Radio on Monday to speak about a new study by the University of Montreal that followed 4,000 Canadian teenagers from age 12 to 16 to learn about the effects of screen time.

"This is one of the first really good longitudinal studies, meaning they follow the same group of kids for four years and have them self-testify what their screen time is," Ihnatko said. "They found some interesting things, like that the more time these kids were spending on computer time and phone time tended to intensify if they were struggling with anxiety and depression."