L10Amnesia.6slides - Chunking FB ICI AFD RJF K Where is the...

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Page ‹#› 1 Chunking FB ICI AFD RJF K FBI CIA FDR JFK 2 Where is the phonological loop in the brain? “No” Response “No” Response “No” Response “Yes” Response M P F P The 2-Back Task “was this letter seen 2 back?” “No” Response “No” Response “Yes” Response M P F M The Search Task “ Is this the letter M? ” 6 PET subtraction: Rehearsal Mental Processes in 2-back task - Mental Processes in Search task Rehearsal Process in 2-back PET activation in 2-back task - PET activation in Search task Brain areas related to Rehearsal
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Page ‹#› Cross-section here Areas active in 2-back but not in Search Broca’s Phonological WM View: top of head Parietal Brain areas related to 9 Working Memory Model (Baddeley) Visuospatial Buffer Central Executive Phonological Buffer 10 The visuospatial buffer The component of WM devoted to visual imagery and spatial processing Information can enter the buffer either directly from visual perception from long-term memory Information can then be treated like a percept: scanned, rotated, enlarged etc. 11 Double dissociation: visuospatial sketchpad vs. phonological loop Behavioral evidence Brooks (1968) Biological evidence Jonides et. al (1993) 12 Brooks (1968) Two tasks visuospatial task phonological control task Two forms of response vocal response visuospatial response Dependent variable = time to finish responding
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Page ‹#› Yes No Visuospatial Task Yes No Yes Yes Yes Yes Yes Yes No No 14 Verbal task “A bird in the hand is in the bush” N Y N N Y N N N Y 15 Vocal response: Say “Yes” or “No” Visuospatial Response. Point to the answer: 1. Yes No 2. Yes No 3. Yes No 4. Yes No 5. Yes No Brooks’ Experiment Brooks task interference effects: 30 20 15 10 5 0 25 Vocal response Pointing response Block Letters Sentences Completion Time (sec) Memory Condition Control Condition
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This note was uploaded on 12/26/2009 for the course PSYCH 240 taught by Professor Gehring during the Fall '08 term at University of Michigan.

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L10Amnesia.6slides - Chunking FB ICI AFD RJF K Where is the...

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