Policies, Contexts, Histories, and Everyday Stressors and Supports (CHESS) Model of Adolescent Affective Wellbeing, as applied to the COVID-19 Pandemic. NA = Negative Affect. PA = Positive Affect. Constructs bolded in black are well-represented in the pandemic daily diary literature; all others are proposed conceptually but less well-researched in the diary literature. Black arrows represent between-person processes, varying across individuals at one point in time. Grey arrows represent within-person processes, unfolding over moments and days within individual adolescents, as captured by diary studies.