1.
Sample characteristics (Gender and SES), descriptive statistics, and Chi 2 for comparison in gender, SES and nonverbal reasoning indicators ( N = 230).
2.
Sample characteristics (age), descriptive statistics, and t-tests of comparison in age and verbal intelligence indicators.
Order of presentation and distribution of the tests by session.
Means (Standard deviations) of the different tasks administered, by grade.
BF resulting from Bayesian ANOVAs on alerting, cognitive flexibility, and working memory measures in Grade 2.
BF resulting from Bayesian ANOVAs on alerting, cognitive flexibility, and working memory measures in Grade 5.
Means (Standard Deviations) for the arithmetic task administered by grade.
S1 Annex -
PRISMA 2009 checklist.
PRISMA flow diagram of the included studies.