child human 1,635 Humans 1,367 female 1,245 Child 1,237 male 1,196 Female 904 Male 867 adolescent 774 Adolescent 637 adult 577 Article 531 preschool child 520 controlled study 471 Child, Preschool 447 major clinical study 423 Adult 396 article 359 psychology 281 young adult 281 Young Adult 260 infant 244 human experiment 217 procedures 214 clinical article 196 physiology 196 Infant 184 school child 179 middle aged 178 child parent relation 175