Further evidence of preserved memory function in Alzheimer's disease

  title={Further evidence of preserved memory function in Alzheimer's disease},
  author={L. C. Scott and G. K. Wright and Gurcharan S. Rai and A. N. Exton-smith and J. Matthew Gardiner},
  journal={International Journal of Geriatric Psychiatry},
Memory performance of elderly patients in the early stages of Alzheimer's disease (DAT) was compared with that of elderly control subjects. In explicit tests of recognition memory, which involve conscious recollection, the DAT patients were grossly impaired. In implicit tests of anagram solution and wordstem completion, which do not require conscious recollection, the DAT patients were not impaired. These findings further support the idea that a separate memory system, episodic memory… Expand
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Results indicate that the degree of semantic impairment represents one important variable affecting the amount of WSC priming which results when deep encoding procedures are used at study. Expand
Using an implicit memory task to estimate premorbid memory.
  • R. Hilsabeck, P. Sutker
  • Psychology, Medicine
  • Archives of clinical neuropsychology : the official journal of the National Academy of Neuropsychologists
  • 2009
Two studies designed to explore the utility of an implicit memory task, Anagrams Solutions, for estimating premorbid memory ability found that it was not a useful estimate and that a combination of IQ and demographic variables accounted for 24-31% of the variance in measured memory performances. Expand
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Clinical diagnosis of Alzheimer's disease
The criteria proposed are intended to serve as a guide for the diagnosis of probable, possible, and definite Alzheimer's disease; these criteria will be revised as more definitive information becomes available. Expand
Preserved learning of novel information in amnesia: Evidence for multiple memory systems
  • B. Gordon
  • Medicine, Psychology
  • Brain and Cognition
  • 1988
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Priming Effects in Amnesia: Evidence for a Dissociable Memory Function
  • A. Shimamura
  • Psychology, Medicine
  • The Quarterly journal of experimental psychology. A, Human experimental psychology
  • 1986
The phenomenon of preserved priming effects in amnesia is reviewed, relationships between priming and other memory functions are described, and what this spared memory function tells us about the organization of memory is commented on. Expand
The effect of prior learning on subsequent retention in amnesic patients.
Findings are incompatible with an interpretation in terms of a failure of consolidation, but are compatible with one that attaches importance to interference phenomena in the amnesic syndrome. Expand
Computer learning by memory-impaired patients: Acquisition and retention of complex knowledge
The results indicated that patients with memory disorders of varying severity could learn to manipulate information on the computer screen, to write, edit and execute simple computer programs, and to perform disk storage and retrieval operations. Expand
On the relationship between autobiographical memory and perceptual learning.
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Correlational analyses of explicit and implicit memory performance
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Activation makes words more accessible, but not necessarily more retrievable.
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