Time spent on activities involving screen-based technology such as watching television as well as computer, mobile phone and tablet use has been shown to be associated with a range of behavioural and psychological outcomes in children and adolescents, although the findings have not been consistent. Some studies have been cross-sectional and, as such, have been unable to determine whether the increased screen time is a cause or consequence of poor mental health. Some studies have found a link with specific conditions but not others; other studies have indicated that the apparent association may be due to other factors such as social class and the extent of parent-child interaction.

ALSPAC has collected information on both screen time and anxiety at various times throughout childhood and adolescence. Using these data we would like to determine whether there is an association between screen time and anxiety among adolescents. Since both screen time and anxiety were measured repeatedly, we will also use the data to help us determine the direction of this association.