Female article female 112 Humans 111 human 111 male 100 Male 93 adult 86 human experiment 66 Adult 59 controlled study 55 Young Adult 41 young adult 41 physiology 40 major clinical study 35 child 34 Middle Aged 32 middle aged 32 psychology 27 adolescent 26 Adolescent 25 Child 24 clinical article 21 learning 20 procedures 16 questionnaire 16 Child, Preschool 15 Surveys and Questionnaires 15 preschool child 15 infant 13