Female Humans 99 female 99 human 99 student male 96 Male 94 Students 82 adult 64 psychology 57 young adult 57 Young Adult 55 Adolescent 53 adolescent 53 Adult 46 article 39 major clinical study 34 controlled study 33 human experiment 31 university 31 Universities 30 questionnaire 25 Surveys and Questionnaires 22 Article 21 child 17 physiology 15 Schools 14 United States 14 middle aged 14 procedures 14