association (4) âge (4) Social groups (4) Meta-analysis (4) Age (4) Age (4) cohorte (3) sommeil (2) établissement scolaire (2) persistance (2) besoin (2) santé (2) Union européenne (2) enfant (2) Language (2) Children (2) Scores (2) Wechsler Preschool and Primary Scale of Intelligence (2) Preschool children (2) Ci (Chinese poetry) (2) Tallies (2) Sleep (2) Science (2) School children (2) Regression analysis (2) Persistence (2) Intellect (2) Health (2) Estimates (2) Eden (2)