Child, Preschool Humans 117 child human 117 preschool child 117 female 111 male 110 Female 109 Male 109 Child 102 psychology 99 child parent relation 55 adult 50 adolescent 44 Adolescent 42 Adult 42 Article 37 controlled study 34 infant 33 Parenting 30 Parents 30 physiology 30 Infant 29 major clinical study 29 mother 28 article 24 longitudinal study 24 Mothers 23 Longitudinal Studies 21 child behavior 21