title: Retardation in mathematics: a consideration of multi-factorial determination.
mesh_terms: D000293:Adolescent; D000342:Affective Symptoms / Q000523:psychology; D002648:Child; D003210:Concept Formation; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000523:psychology*; D007859:Learning Disabilities / Q000523:psychology; D008297:Male; D008433:Mathematics; D012737:Sex Factors; D012959:Socioeconomic Factors; D013028:Space Perception; D013663:Teaching