This study tested the Family Stress Model (FSM) — whether family income affects child mental health via parental distress — using a Random Intercept Cross-Lagged Panel Model (RI-CLPM) on the UK Millennium Cohort Study (N = 11,845; ~49.9% female) across five waves when children were ages 3, 5, 7, 11, and 14.
Within-person drops in family income predicted later increases in internalizing problems for boys (ages 3–5) and girls (ages 7–11). Income also predicted externalizing problems indirectly, but only in girls and only through maternal — not paternal — distress.
- The full paper text provided is a dataset user guide (MCS documentation), not the primary study manuscript; summary data (effect sizes, confidence intervals) are drawn only from the abstract. - The study covers a UK birth cohort born 2000–2001, which may limit generalizability to other countries or more recent economic contexts. - Attrition across five waves (from 18,552 at wave 1 to ~11,845 analyzed) could bias results despite weighting adjustments.
When families face economic hardship, clinicians and social workers should screen maternal mental health as a priority — it appears to be the key pathway to externalizing problems in girls. Interventions targeting mothers' distress during financial stress may help protect children's behavioral health.
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