title: IQ constancy and age.
mesh_terms: D000293:Adolescent; D000375:Aging; D002648:Child; D002657:Child Development; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007360:Intelligence; D007361:Intelligence Tests; D008297:Male; D011336:Probability; D012737:Sex Factors