The aim of this study was to identify the prevalence of media addiction and its associated factors in elementary school children based on the problem behavior theory. This cross-sectional study was a secondary data analysis using national data from the 10th Panel Study on Korean Children 2017, which included 1,078 families of third-grade students…

This study uses data from the Early Childhood Longitudinal Study, Kindergarten Class of 1998-1999 (ECLS-K) to examine how children's skills and knowledge at kindergarten entry predict their achievement in later grades. It extends previous research by examining longer-term achievement outcomes, namely test scores at the end of fifth grade, and…