title: Some thoughts on why the prevalence of learning disabilities has increased.
authors.affiliation: University of Virginia, Curry School of Education, Charlottesville 22903.
authors.forename: D P
authors.initials: DP
authors.lastname: Hallahan
mesh_terms: D002648:Child; D003430:Cross-Sectional Studies; D003466:Cultural Characteristics; D006801:Humans; D015994:Incidence; D007859:Learning Disabilities / Q000175:diagnosis / Q000453:epidemiology* / Q000209:etiology; D008137:Longitudinal Studies; D019965:Neurocognitive Disorders / Q000175:diagnosis / Q000453:epidemiology / Q000209:etiology; D012307:Risk Factors; D012931:Social Environment; D014481:United States / Q000453:epidemiology