title: Frequency of public smiling across the life span.
authors.affiliation: Department of Psychology, Temple University, Philadelphia, PA 19122, USA. CHAPELL@vm.temple.edu
authors.forename: M S
authors.initials: MS
authors.lastname: Chapell
mesh_terms: D000293:Adolescent; D000328:Adult; D000339:Affect / Q000502:physiology; D017677:Age Distribution; D000368:Aged; D000375:Aging / Q000502:physiology*; D002648:Child; D002675:Child, Preschool; D004644:Emotions / Q000502:physiology; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D012737:Sex Factors; D012904:Smiling / Q000502:physiology*; D012919:Social Behavior