Child Development child development 80 human 80 Humans 79 female 71 male 68 Female 64 Male 63 child 63 Child 53 physiology 52 preschool child 45 Child, Preschool 43 article 25 infant 24 adult 23 Article 21 Infant 21 adolescent 20 human experiment 20 Adolescent 19 Adult 19 major clinical study 15 psychology 15 controlled study 14 child parent relation 13 learning 13 child behavior 12 longitudinal study 12 Longitudinal Studies 11