Studies of Implicit Prototype Extraction in Patients With Mild Cognitive Impairment and Early Alzheimer's Disease.
Studies of incidental category learning support the hypothesis of an implicit prototype-extraction system that is distinct from explicit memory (Smith, 2008). In those studies, patients with explicit-memory impairments due to damage to the medial-temporal lobe performed normally in implicit categori...
| Publicado en: | Journal of Experimental Psychology. Learning, Memory & Cognition Vol. 38; no. 4; pp. 860 - 881 |
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| Autores principales: | , , , , |
| Formato: | Artículo |
| Publicado: |
American Psychological Association
Jul2012
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ssf&AN=77491321&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 77491321 longDbName: Social Sciences Full Text (H.W. Wilson) uiTag: AN controlInfo: bkinfo: jinfo: jid: 02787393 EXL jtl: Journal of Experimental Psychology. Learning, Memory & Cognition issn: 02787393 maglogo: N pubinfo: dt: Jul2012 vid: 38 iid: 4 pid: 34 pub: American Psychological Association artinfo: ui: 77491321 10.1037/a0028064 ppf: 860 ppct: 21 formats: tig: atl: Studies of Implicit Prototype Extraction in Patients With Mild Cognitive Impairment and Early Alzheimer's Disease. aug: au: Nosofsky, Robert M. Denton, Stephen E. Zaki, Safa R. Murphy-Knudsen, Anne F. Unverzagt, Frederick W. affil: Department of Psychological and Brain Sciences, Indiana University, Bloomington, 47405 Department of Psychology, Williams College Department of Psychiatry, Indiana University School of Medicine su: Categorization (Psychology) Cognitive learning Mild cognitive impairment Alzheimer's disease Implicit learning Explicit memory Amnesia sug: subj: Categorization (Psychology) Cognitive learning Mild cognitive impairment Alzheimer's disease Implicit learning Explicit memory Amnesia keyword: amnesia categorization explicit memory implicit learning amnesia categorization explicit memory implicit learning ab: Studies of incidental category learning support the hypothesis of an implicit prototype-extraction system that is distinct from explicit memory (Smith, 2008). In those studies, patients with explicit-memory impairments due to damage to the medial-temporal lobe performed normally in implicit categorization tasks (Bozoki, Grossman, & Smith, 2006; Knowlton & Squire, 1993). However, alternative interpreta-tions are that (a) even people with impairments to a single memory system have sufficient resources to succeed on the particular categorization tasks that have been tested (Nosofsky & Zaki, 1998; Zaki & Nosofsky, 2001) and (b) working memory can be used at time of test to learn the categories (Palmeri & Hanery, 1999). In the present experiments, patients with amnestic mild cognitive impairment or early Alzheimer's disease were tested in prototype-extraction tasks to examine these possibilities. In a categorization task involving discrete-feature stimuli, the majority of subjects relied on memories for exceedingly few features, even when the task structure strongly encouraged reliance on broad-based prototypes. In a dot-pattern categorization task, even the memory-impaired patients were able to use working memory at time of test to extract the category structure (at least for the stimulus set used in past work). We argue that the results weaken the past case made in favor of a separate system of implicit prototype extraction. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
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