Wellbeing and cognition are coupled during development: A preregistered longitudinal study of 1137 children and adolescents
Wellbeing and cognition are linked in adulthood, but how the two domains interact during development is currently unclear. Using a complex systems approach, we preregistered and modelled the relationship between wellbeing and cognition in a prospective cohort of 1137 children, aged 6 - 7 up to 15 years. We found bidirectional interactions between wellbeing and cognition that unfold dynamically over time. Higher externalizing symptoms in childhood predicted fewer gains in planning over time (estimate = - 0.24, p = .019), whereas higher childhood vocabulary predicted smaller increases in loneliness over time (estimate = -0.62, p = < .001). These interactions were characterized by modifiable risk and resilience factors: Relationships to parents, friendship quality, socioeconomic status and puberty onset were all linked to both cognitive and wellbeing outcomes. As such, cognitive and wellbeing are inextricably intertwined in during development and can be modified by social and biological factors.