title: The de-differentiation hypothesis in normal elderly persons.
abstract: Summary.-The factor structure of intelligence was examined, as assessed on the Wechsler Adult Intelligence Scale-Revised, in two groups of Italian normal elderly participants ages 65 to 100 years (ns = 267 and 256). Analysis provided further support for the de-differentiation hypothesis in the Italian population: cognitive abilities differentiate from adolescence to adulthood and then the process is reversed in later adulthood.
authors.affiliation: Department of Biomedical Sciences, G. d'Annunzio University, Chieti-Pescara, Italy.
authors.forename: Michela
authors.initials: M
authors.lastname: Balsamo
authors.forename: Roberta
authors.initials: R
authors.lastname: Romanelli
authors.forename: Aristide
authors.initials: A
authors.lastname: Saggino
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000375:Aging / Q000523:psychology*; D005260:Female; D006801:Humans; D007360:Intelligence; D007558:Italy; D008297:Male; D011594:Psychometrics / Q000706:statistics & numerical data; D012016:Reference Values; D014888:Wechsler Scales / Q000706:statistics & numerical data*