title: [FACTOR ANALYTIC STUDIES ON THE DIFFERENTIATION HYPOTHESIS OF INTELLIGENCE: THE HYPOTHESIS OF PERFORMANCE DIFFERENTIATION].
mesh_terms: D000293:Adolescent; D000375:Aging; D001699:Biometry; D002648:Child; D005163:Factor Analysis, Statistical; D006801:Humans; D007360:Intelligence; D007361:Intelligence Tests; D000297:Psychology, Adolescent; D002666:Psychology, Child
keywords: ADOLESCENT PSYCHOLOGY; AGING; CHILD PSYCHOLOGY; FACTOR ANALYSIS, STATISTICAL; INTELLIGENCE TESTS
vernacular_title: FAKTORENANALYTISCHE UNTERSUCHUNGEN ZUR DIFFERENZIERUNGSHYPOTHESE DER INTELLIGENZ: DIE LEISTUNGSDIFFERENZIERUNGSHYPOTHESE.