human 20 Humans 18 Iowa 16 female 15 male 13 Female 12 adult 12 adolescent 11 Adolescent 10 Male 10 Adult 8 Child 8 child 8 psychology 8 United States 7 Iowa Gambling Task 6 Article 5 Child, Preschool 5 decision making 5 preschool child 5 Fluorides 4 Middle Aged 4 Mothers 4 Neuropsychological Tests 4 Stress, Psychological 4 Young Adult 4 fluoride 4 major clinical study 4 mental stress 4 middle aged 4