Several influential studies reported sex differences in early care and education (ECE) treatment on young adult IQ and academic outcomes. This paper extends that work by asking whether sex differences in impacts of the Carolina Abecedarian Project emerged during the treatment period or subsequently and whether sex differences were maintained into middle adulthood. The randomized clinical trial (98 % Black, 51 % female) followed 104 infants 5 to 45 years of age. Longitudinal analyses estimated treatment and sex-by-treatment differences at 5 years, from 5 to 21 years, and at 21 and 45 years. Results revealed treated children entered school with higher IQ and reading skills than control children. Treatment impacts on IQ and math increased over time for females and decreased for males yielding sex differences in treatment impacts at 21 and 45 years. These findings suggest that, while the ECE treatment similarly benefited boys and girls in the short term, the long-term impacts likely depended on subsequent experiences.
Findings from this paper provide further evidence that ECE can improve educational outcomes for low-income Black children, but that subsequent experiences may erode those impacts especially for low-income Black males.
Interpersonal stress has been consistently linked with poorer adjustment, and healthy sleep may play a promotive or protective role in this relation. However, little is known regarding such associations among children. The current study examined longitudinal associations between daily interpersonal stress, sleep, and internalizing/externalizing symptoms during middle childhood.
At age 8 years, participants wore actigraphy watches for 7 days to capture sleep, and primary caregivers reported on children's daily interpersonal stress, internalizing/externalizing symptoms, and sleep problems. At age 9 years, children self-reported symptoms.
Greater daily interpersonal stress at age 8 years predicted greater internalizing/externalizing symptoms at age 9 years. Higher sleep efficiency predicted fewer externalizing symptoms. Sleep duration moderated links between interpersonal stress and internalizing/externalizing symptoms, but associations were positive and significant for children with average and high duration only.
Findings advance our understanding of links between interpersonal stress, sleep, and child adjustment and can inform targeted family and school interventions.