Child, Preschool 3 Female 3 Humans 3 Male 3 female 3 human 3 male 3 physiology 3 preschool child 3 shyness 3 Child 2 Follow-Up Studies 2 Longitudinal Studies 2 Prospective Studies 2 Shyness 2 Temperament 2 child 2 follow up 2 longitudinal study 2 pathophysiology 2 prospective study 2 ADHD 1 Adolescent 1 Affect 1 Age Factors 1 Anxiety Disorders 1 Attention 1 Attention Deficit Disorder with Hyperactivity 1 BP Islam. Bahaism. Theosophy, etc 1 Behavioral Symptoms 1