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Implicit Processes Enhance Cognitive Abilities in Amnestic-Mild Cognitive Impairment Gillian Rowe 1, 2, Angela 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 Alzheimer’s Disease International Toronto March 27, 2011 CONFIDENTIAL Pg 1

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

Conflict of Interest Disclosure Gillian Rowe, Ph. D Angela Troyer, Ph. D Kelly Murphy, Conflict of Interest Disclosure Gillian Rowe, Ph. D Angela Troyer, Ph. D Kelly Murphy, Ph. D Lynn Hasher, Ph. D Renee Biss, M. A. Has no real or apparent conflicts of interest to report. Pg 3

Background and Purpose • Pattern of impaired explicit and intact implicit memory observed in Background and Purpose • Pattern of impaired explicit and intact implicit memory observed in individuals with a. MCI • 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 Pg 4

Background and Purpose • Previously shown with healthy older adults Rowe et al. , 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 Pg 5

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

Method • Used adaptation of earlier work • Participants – 22 a. MCI – Method • Used adaptation of earlier work • Participants – 22 a. MCI – 22 matched healthy controls • Same/different judgments of consecutive stream of line drawings. Ignore letter strings EMBLEM LIVER HFXVV LOTTERY Pg 7

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

Method Word-Fragment Completion Task E___ER SU__LY WI__ER LI__R A__IT_ON E___EM ERASER 30 word fragments Method Word-Fragment Completion Task E___ER SU__LY WI__ER LI__R A__IT_ON E___EM ERASER 30 word fragments SUPPLY 10 words told to ignore WINNER 10 not Iseen earlier L VER MB TION 10 Aeasy. I fillers EMBLEM Say first thing came into head __AM_ STAMP L_T_E_Y LOTTERY _R_V_ GRAVY Pg 9

Method Word-Fragment Completion Task E___ER ERASER SU__LY SUPPLY WI__ER WINNER LI__R LIVER A__IT_ON AMBITION Method Word-Fragment Completion Task E___ER ERASER SU__LY SUPPLY WI__ER WINNER LI__R LIVER A__IT_ON AMBITION E___EM EMBLEM __AM_ STAMP L_T_E_Y LOTTERY _R_V_ GRAVY Pg 10

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

Results Priming • Correlation between implicit and explicit memory (a. MCI) CBT Pg 12 Results Priming • Correlation between implicit and explicit memory (a. MCI) CBT Pg 12

How can this be applied to everyday and autobiographical memory? • Similar paradigm using 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 Pg 13

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