The developmental interplay between household chaos and educational achievement from age 9 through 16 years: A genetically sensitive study

We tested whether associations between household chaos, which refers to confusion and disorganisation in family homes, and educational achievement are confounded by genetics and family socioeconomic status (SES). We modelled the developmental interplay between chaos and achievement, including their reverse association (i.e., achievement chaos), and its aetiology in up to 7,591 twin pairs (49% female), who were born in the mid-90s in the UK and assessed at age 9, 12, and 16 years. Associations between household chaos and educational achievement were consistently negative, bidirectional, and of small effect sizes across ages. These associations were best explained by genetic and environmental confounding. Family SES accounted for most of the confounding in the predictions from achievement to chaos; for the reverse, environments shared within families but distinct from SES were implied. Our findings suggest that long-term associations between children’s experiences of household chaos and educational achievement are modest and non-causal.