human 124 human experiment article 112 female 81 male 78 adult 74 Humans 69 controlled study 47 major clinical study 32 Female 29 Male 27 questionnaire 27 quantitative analysis 24 education 23 Adult 22 procedures 20 clinical article 18 physiology 18 psychology 18 child 16 learning 15 young adult 14 adolescent 13 decision making 13 randomized controlled trial 13 Middle Aged 12 middle aged 12 Article 11 Young Adult 11 normal human 11