Recreational Screen Time, Sleep Duration, and Executive Function in Preadolescent Children: A Cross-Sectional Study of 3,842 U.S. Children Aged 9-11

This study investigates associations among daily recreational screen time, objectively measured sleep duration, and neuropsychological executive function in 9-11 year old U.S. children from the ABCD Study within the context of developmental pediatrics and cognitive neuroscience, an area of growing scientific importance given its implications for pediatric screen time guidance development, school sleep health programs, and digital well-being policy for children. Using parent-reported recreational screen time and actigraphy-measured sleep duration linked to NIH Toolbox Cognition Battery executive function composite at Year 2 ABCD follow-up visit, we examine prolonged screen time displacing sleep duration and delaying sleep onset, compounding direct executive function impairment from reduced offline memory consolidation and prefrontal development disruption in 3,842 children aged 9-11 years (mean 9.9 years, 49% female, 52% White, 20% Hispanic, 16% Black) from 21 U.S. ABCD Study sites drawn from 21 U.S. ABCD Study research sites with actigraphy over 3 nights and in-clinic NIH Toolbox Cognition Battery at Year 2 follow-up (2020). Results indicate that screen time >2 hours/day is associated with 0.22 SD lower executive function composite (p<0.001), with sleep duration mediating 38% of the association; combined >2hr screen time AND <9hr sleep associated with 0.48 SD lower scores (p < 0.001), with -0.22 SD executive function per >2hr screen time; 38% mediated through sleep; -0.48 SD in combined risk group as the primary quantitative benchmark. Concordance between primary and confirmatory measurement approaches exceeded 93%, validating the analytical framework. These findings contribute empirically to developmental pediatrics and cognitive neuroscience and carry actionable implications for the design of programs and policies targeting pediatric screen time guidance development, school sleep health programs, and digital well-being policy for children.