Female Humans 136 female 136 human human experiment male 126 Male 123 article 123 adult 111 Adult 88 young adult 67 Young Adult 66 controlled study 60 major clinical study 51 physiology 48 Adolescent 46 adolescent 46 Middle Aged 37 middle aged 37 procedures 34 psychology 33 child 31 Child 21 clinical article 20 aged 19 learning 19 Aged 18 diagnostic imaging 18 perception 18 education 16