The amount of time people in the UK watch television has been in decline, especially among those aged between 16 and 24.
Viewing times among young people dropped for the third consecutive year, going down to an average 148 minutes a day in 2013 from 169 minutes in 2010.
Viewing by 4 to 15-year-olds has fallen 22% and viewing among 16 to 34-year-olds went down 15%, according to the study by Enders Analysis.
The biggest declines in viewing by young people were in the north and Scotland, where they watched more television to begin with.
The change in habits is being ascribed to the greater popularity of smartphones and tablets. Faster internet speeds, both at home and on the go, are also probably key factors.
But it is not believed that young people are necessarily using these devices to watch TV. There are a host of competing attractions, such as YouTube, news websites, online shopping and social networking.
The television industry has always sought to capture young audiences, but that is becoming increasingly difficult.
The BBC has spent a good deal of money in providing greater online services, but commercial broadcasters have lagged behind.
