temperament 21 female 19 human 19 Humans 18 Temperament 18 male 17 Female 16 child 16 Male 15 Child 14 psychology 14 preschool child 13 Child, Preschool 12 physiology 11 child parent relation 9 Infant 8 infant 8 Adult 7 adult 7 child behavior 7 Parents 6 Article 5 Child Behavior 5 Emotions 5 Longitudinal Studies 5 emotion 5 longitudinal study 5 Mother-Child Relations 4 Mothers 4 Parent-Child Relations 4