human 95 Humans 79 female 59 male 59 Male 48 Female 45 child 41 adolescent 33 adult 32 Adolescent 31 Child 27 article 26 major clinical study 26 Adult 24 controlled study 22 psychology 21 Article 19 Middle Aged 19 middle aged 19 human experiment 17 preschool child 17 United States 16 questionnaire 16 Students 15 Surveys and Questionnaires 15 young adult 15 Schools 14 Young Adult 14 school 14 Child, Preschool 13