Female female 224 human 221 Humans 220 male 196 Male 191 adult 137 Adult 117 psychology 83 middle aged 70 Middle Aged 68 Article 67 young adult 64 Young Adult 63 adolescent 61 child 59 Adolescent 58 controlled study 56 interpersonal communication 56 Child 54 Communication 49 aged 48 physiology 47 article 45 Aged 41 major clinical study 40 questionnaire 36 Surveys and Questionnaires 32 preschool child 32 human experiment 31