title: Different patterns of cognitive slowing produced by Alzheimer's disease and normal aging.
abstract: Aging has previously been shown to produce a generalized proportional slowing of all cognitive operations. In contrast, the present results suggested that Alzheimer's disease produces a disproportionate reduction in the speed with which patients carry out one or more mental operations. The tasks that demented patients found particularly difficult involved either a self-directed search of their lexicon or the use of familiarity information.
authors.affiliation: Department of Psychiatry, University of Pittsburgh, Pennsylvania 15213.
authors.forename: R D
authors.initials: RD
authors.lastname: Nebes
authors.forename: D J
authors.initials: DJ
authors.lastname: Madden
mesh_terms: D000368:Aged; D000544:Alzheimer Disease / Q000523:psychology*; D005556:Form Perception; D006801:Humans; D008568:Memory; D011939:Mental Recall; D010364:Pattern Recognition, Visual; D011930:Reaction Time; D012016:Reference Values; D014706:Verbal Learning