Supplemental mediation analyses with the length of videogame play as a mediator variable We conducted one-tailed mediation analyses that modeled the length of videogame play as a mediator of the effects of childhood SES on IQ after confirming that the abovementioned additional multiple regression analyses including the length of videogame play as an additional covariate made some of the significant results in the main analyses marginally insignificant.
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Childhood socioeconomic status is associated with psychometric intelligence and microstructural brain development.
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