Humans 146 human psychology female 139 male 139 Female 136 Male 135 child parent relation 133 child 118 Child 109 Parents 84 adult 82 Adult 77 adolescent 70 preschool child 70 Child, Preschool 69 Adolescent 68 Parenting 61 Article 45 controlled study 44 Parent-Child Relations 43 longitudinal study 38 mother 38 Longitudinal Studies 35 questionnaire 34 major clinical study 32 Mothers 31 physiology 31 Surveys and Questionnaires 30 infant 30