This study sampled 99 families of adolescents in 9th or 10th grade using a 21-day daily diary design. Adolescents and parents responded to items from the Family Environment Scale to capture family cohesion and conflict; adolescents reported on their daily symptoms and positive well-being. Daily survey compliance was excellent; adolescents averaged 18.92 and parents averaged 20.27 of 21 days.
Reliable change scores indicated that there was meaningful within-family family cohesion (.76) and conflict (.67) (Bolger & Laurenceau, 2013). Building on these results, we then computed two sets of multilevel models in which adolescents’ daily mood and well-being were regressed on either cohesion or conflict, disentangling within-family and between-family effects.
Across analyses with family conflict as a predictor, unique effects were found for within-family and between-family effects. At a between-family level, families that were higher in average conflict across days had significantly lower average levels of anger (.66**), anxiety (.40**), and depression (.52**); and lower levels of positive affect (-.44**), life satisfaction (-.41**), and purpose in life (-.45**). Within-family results also indicated that on days when families experienced higher than their typical conflict, youth also experienced increases in their anger (.27**), anxiety (.11**), and depression (.11**), as well as decreases in positive affect (-.17**), life satisfaction (-.15**), and purpose in life (-.15**).
Family cohesion exhibited a consistent, yet reverse pattern of effects. At a between-family level, families that were higher in average cohesion had adolescents with less anger (-.31**) and depression (-.31**), as well as higher positive affect (.51**), life satisfaction (.52**), and purpose in life (.67**). At the within-family level, on days when families were more cohesive then their typical levels, adolescents reported decreases in anger (-.33**), anxiety (-.09*), and depression (-.15**), as well as increases in their positive affect (.30**), life satisfaction (.25**), and purpose in life (.25**).
These results underscore the importance of capturing daily variation in family functioning to better assess risk and identify malleable family risk and protective factors for family-based interventions.