Lecture 9-working memory - Working Memory Lecture Outline...

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Working Memory
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Lecture Outline Issues: (a) Role of WM in thinking (b) Relationship between WM & LTM 1. Centrality of WM in thinking Raven’s progressive matrices, mental arithmetic Individual differences Raven’s, age, and working memory 2. Dissociating WM and long-term memory Neurobiological evidence Amnesia, WM disorder, double dissociations Behavioral evidence
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Lecture Outline 3. Tripartite theory of WM Phonological loop Visuospatial sketchpad Central executive
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Raven Progressive Matrices
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Mental Arithmetic 836 + 429
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15 15 Flow Diagram 836 + 429
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Working memory: “Reading Span” Read a series of sentences, then recall the final word of each sentence in order. WM span = the number of final words you can remember. The boy ran with the dog. Last night, Tom went to school . RECALL _______ _______
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1. Raven’s scores worse for older people Yes: For old and young people with the same working memory score, Raven’s score is the same. Raven’s gets worse because WM gets worse? 3. WM scores worse for older people span 2. Raven’s better if WM is good spa n
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Interference effects in reasoning All A’s are B’s All B’s are C’s All A’s are C’s Syllogism Random Number Generation (WM task) 3…5...9...4…8...7… 2... Working memory task interferes with reasoning
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Reading There is a sewer near our home who makes terrific suits. “Individual differences”: people with high working memory spans have better comprehension of text. Correlation = .72.
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Anterograde Amnesia Anterograde amnesia: Inability to remember events occurring after brain injury. (Patient H.M.) (Hippocampus)
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Neurobiological evidence Patient H.M. Anterograde amnesia Impaired Long Term Memory Normal Working Memory Patient K.F. Normal Long Term Memory Impaired Working Memory
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Double Dissociations General Logic System A Task 1 System B Task 2 Lesion studies Lesion in area a System A Lesion in area b System B Task 1 Task 2 Task 1 Task 2
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Demo: Serial Position Curve Listen to list of words Afterwards, write down in any order
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