Memory, aging, and Alzheimer Disease

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dc.contributor.advisor Lenzer, Irmingard
dc.creator Lydon, Rosalee G. 2011-05-09T12:32:01Z 2011-05-09T12:32:01Z 1988
dc.identifier.other RC524 L92 1988
dc.description 61 leaves : ill. ; 28 cm.
dc.description Bibliography: leaves 55-61.
dc.description Online version unavailable; Print version available from Patrick Power Library.
dc.description.abstract "Levels of processing" and "dual-store" models were used to examine memory in persons with mild to moderate senile dementia of the Alzheimer type (SDAT) and carefully matched controls free of neurological impairment. Methods of testing included free and cued recall, and recognition memory for lists of words learned under conditions which ranged from free through phonemic (letter, rhyme) to three semantic conditions (object, praxic and objectpraxic combined). The findings were as follows. First, although recalling fewer words under all conditions and test measures, the SDAT subjects produced a pattern of recall qualitatively similar to that of the controls for cued recall and recognition, but not for free recall where their semantic processing appeared differentially impaired. Second, within the SDAT group, the milder but not more impaired subjects freely recalled more words under one semantic (object) relative to a phonemic condition. Third, more words were recalled following a semantic (praxic) cue compared with a phonemic cue, a result which held for both groups as well as the most impaired SDAT subjects. Fourth, the SDAT free recall score in the combination procedure was lower than expected if the individual conditions were additive, as seemed the case for the controls. The findings suggested that the semantic memory system may be selectively vulnerable, and the degree of impairment to certain structures appears related to the degree of dementia. There was also modest indication of a deficiency in processing greater number of stimulus features and attributes. It was proposed that person’s with SDAT have difficulty gaining access to concepts in semantic memory. Regarding the dual-store model, primary (PM) and secondary (SM), and types of intrusion errors were examined. PM and SM measures appeared independent in both groups. (Abstract shortened)
dc.description.provenance Made available in DSpace on 2011-05-09T12:32:01Z (GMT). No. of bitstreams: 0 en
dc.language.iso en
dc.publisher Halifax, N.S. : Saint Mary's University
dc.subject.lcc RC524
dc.subject.lcsh Senile dementia
dc.subject.lcsh Alzheimer's disease
dc.subject.lcsh Memory disorders in old age
dc.title Memory, aging, and Alzheimer Disease
dc.type Text Master of Science in Applied Psychology Masters Psychology Saint Mary's University (Halifax, N.S.)
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