You are correct. I think research started into the effects of TV screens on teenagers sleeping patterns.
Research has indicated that extensive television viewing tends to be associated with sleep problems among children, adolescents, and adults.1-6 However, few studies of risk for sleep problems have assessed television viewing.1 Only 2 studies have investigated the sequencing of the association between television viewing and the development of sleep problems during childhood or early adolescence.2,5 The findings of both studies suggested that television viewing was associated with increased risk for sleep problems during the next 9 to 12 months. However, no prospective longitudinal study has investigated the long-term association of television viewing with the development of sleep problems from early adolescence through early adulthood. Thus, little is known about the nature and direction of the association between television viewing and sleep problems during adolescence and early adulthood.
Research has indicated that extensive television viewing tends to be associated with sleep problems among children, adolescents, and adults.1-6 However, few studies of risk for sleep problems have assessed television viewing.1 Only 2 studies have investigated the sequencing of the association between television viewing and the development of sleep problems during childhood or early adolescence.2,5 The findings of both studies suggested that television viewing was associated with increased risk for sleep problems during the next 9 to 12 months. However, no prospective longitudinal study has investigated the long-term association of television viewing with the development of sleep problems from early adolescence through early adulthood. Thus, little is known about the nature and direction of the association between television viewing and sleep problems during adolescence and early adulthood.
https://jamanetwork.com/journals/jamapediatrics/fullarticle/...