title: WISC-R factor structures of younger and older youth with low IQs.
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002648:Child; D004495:Education of Persons with Intellectual Disabilities; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000175:diagnosis*; D008297:Male; D011594:Psychometrics; D014888:Wechsler Scales