Sleep, Mood, and Affect in Adolescents

Most teenagers experience chronic sleep restriction during school terms, which has been linked to elevated negative mood. This thesis found that teenagers’ sleep duration and quality affected positive and negative emotions to different extents. Overall levels of sleep, rather than daily fluctuations, were more important for teenager’s mood (and vice versa). Finally, with consecutive days of restricted sleep, teenagers desired more sleep as the school week progressed, and utilised weekends/ vacations as opportunities to catch-up on sleep. These findings can inform future research, and the development of personalised interventions that can improve teenagers’ sleep and mood on a daily basis.