Screen Time and Mental Health in Canadian Youth: An Examination of Nationally Representative Data.

As screens have become ubiquitous in modern-day society, investigating the effects of high screen time on mental health is highly warranted. In the past decade, many studies have determined that higher levels of screen time engagement are associated with adverse mental health outcomes like anxiety and depression. However, the nature of the relationship between screen time and mental health requires further investigation to gain a better understanding of its mechanisms and properties. The purpose of this study is to utilize a nationally representative data set to (1) examine how factors like sex, age, and socioeconomic status moderate the relationship between screen time and mental health in Canadian youth and (2) determine whether this relationship supports the Goldilocks hypothesis or an exposure-response curve. It was hypothesized that (1) young, female, lower socioeconomic status individuals will be more strongly associated with poor mental health, and that (2) mental health will peak at low screen time usage, therefore, supporting an exposure-response curve. A series of moderation analyses concluded that young, male, lower socioeconomic status individuals strongly moderated the relationship between screen time and poor mental health compared to their counterparts. Furthermore, three out of the four mental health (presence of mood disorder, presence of anxiety disorder, and depression severity) measures peaked at an average of 12 hours and 19 minutes of screen time per week, hence, supporting the exposure-response curve.