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Alzheimer’s Disease International Toronto March 27, 2011

Implicit Processes Enhance Cognitive Abilities in Amnestic-Mild Cognitive Impairment. Gillian Rowe 1,2 , Angela K. Troyer 1 , Kelly J. Murphy 1,2 , Lynn Hasher 2,3 , & Renee Biss 2. 1 3 2.

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Alzheimer’s Disease International Toronto March 27, 2011

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  1. Implicit Processes Enhance Cognitive Abilities in Amnestic-Mild Cognitive Impairment Gillian Rowe1,2,Angela K. Troyer1, Kelly J. Murphy1,2, Lynn Hasher2,3,& Renee Biss2 1 32 Alzheimer’s Disease International Toronto March 27, 2011

  2. Brian Richards Guy Proulx Acknowledgements Morris Goldenberg Medical Research Endowment

  3. Conflict of Interest DisclosureGillian Rowe, Ph.DAngela Troyer, Ph.DKelly Murphy, Ph.D Lynn Hasher, Ph.D Renee Biss, M.A. Has no real or apparent conflicts of interest to report.

  4. Background and Purpose • Pattern of impaired explicit and intact implicit memory observed in individuals with aMCI • Can be thought of as conscious and unconscious • Research/interventions often target impaired abilities • May be effortful and possibly distressing • Instead, can we use implicit processes to influence explicit • Enhance explicit without effort or awareness

  5. Background and Purpose • Previously shown with healthy older adults Rowe et al., 2006 • Known to be more susceptible to distraction than younger • Evidence they pick up irrelevant information implicitly • Use that information for later task if it becomes relevant • Without awareness

  6. Background and Purpose • People with aMCI also susceptible to distraction • Would same effect be found? • If so, possible opportunities for intervention in aMCI • Everyday memory • Autobiographical memory • Prospective memory

  7. Method • Used adaptation of earlier work • Participants • 22 aMCI • 22 matched healthy controls • Same/different judgments of consecutive stream of line drawings.Ignore letter strings E M B L E M H F X V V L I V E R L O T T E R Y

  8. Method • 10 min filler - computerized Corsi Block task

  9. Word-Fragment Completion Task Method 30 word fragments 10 words told to ignore 10 not seen earlier 10 easy fillers Say first thing came into head

  10. Word-Fragment Completion Task Method

  11. Results More words fragments solved for previously seen words Significantly more for aMCI group compared to controls

  12. Results • Correlation between implicit and explicit memory (aMCI) Priming CBT

  13. How can this be applied to everyday and autobiographical memory? • Similar paradigm using everyday situation/materials • Virtual shopping mall • Explicit task: list of items to buy • Test for irrelevant information

  14. Brian Richards Guy Proulx Acknowledgements Morris Goldenberg Medical Research Endowment

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