human 258 female 200 Humans 196 male 192 Female 164 Male 158 adult 156 psychology 127 Adult 115 article 85 young adult 72 Young Adult 71 physiology 71 middle aged 68 Middle Aged 66 adolescent 63 Adolescent 60 child 52 human experiment 52 controlled study 49 major clinical study 47 questionnaire 46 Child 45 Article 44 Surveys and Questionnaires 39 United States 38 aged 37 Aged 31 child parent relation 30 longitudinal study 29