human Humans 391 female 385 male 363 child 320 Female 292 Male 274 Child 239 child parent relation 218 psychology 189 adolescent 187 adult 180 Adolescent 159 preschool child 152 Child, Preschool 144 Article 138 Parents 132 controlled study 132 Adult 130 article 111 major clinical study 110 questionnaire 102 Parenting 85 Surveys and Questionnaires 78 infant 76 mother 71 longitudinal study 66 physiology 63 Infant 60 cross-sectional study 60