| http://www.w3.org/ns/prov#value | - Several high-quality studies examined the prevalence of media exposure21 and its associations with cognitive development,22 hyperactivity-inattention, and prosocial behavior.23,24 Most studies13,25,26 of externalizing problems in preschool children, however, have limitations, such as relatively small and high-risk samples25 and cross-sectional data,13,26 which cannot establish the temporality of t
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