ABSTRACT
The impact of social media engagement on the mental health of teenagers is investigated in this chapter’s news story. A longitudinal study design that captured information over time provides the basis through which teenager mental health is evaluated. The measurement of behavior and emotional responses is described along with the properties of such scales (validity, reliability). Sample surveys and other observational study designs are discussed. Summary statistics for understanding the distribution of variables in a study sample are reviewed along with risk comparisons derived from statistical models. Probability, odds and odds ratios are defined as part of describing risk models such as logistic regression with the important distinction between absolute and relative risk being described. Adjustments in model projections to account for the impact of other variables are also reviewed. Journalists’ search for alternative explanations for claims made in studies is defined as part of their job description. Media do not usually have a direct effect on audiences and this point is emphasized here.
