memory chapter 10
TRANSCRIPT
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Chapter 10
Memory and Thought
Section 1
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FOCUS
• Which one would be more frightening to you:
• Not being able to remember the past
OR
• Not being able to learn anything new
• WHY?
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Story
• Page 273
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The Processes of Memory
• Encoding
• Storage
• Retrieval
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Encoding
• The transforming of information so that the nervous system can process it
• You use your senses to encode and establish a memory
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Storage
• The process by which information is maintained over time
• Can be stored a few seconds or for a lot longer
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Retrieval
• Occurs when information is brought to mind from storage
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Three Stages of Memory
• Sensory Memory
• Short-term Memory
• Long-term Memory
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Sensory Memory
• The senses of sight and hearing are able to hold an input for a fraction of a second before it disappears
• George Sperling– Iconic memory- hold visual input for up to a
second– Echoic memory- auditory sensory memory
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Three functions of sensory memory
• Prevents you from being overwhelmed
• Gives you decision time– Gives you a chance to process whether or not
you want the memory to remain in short term memory or forget it
• Allows for continuity and stability in your world
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Short Term Memory
• Does not necessarily involve paying close attention
• Limited in capacity up to seven items
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Maintenance Rehearsal
• A system for remembering that involves repeating information to oneself without attempting to find meaning in it
• Figure 10.3 “Spot the Real Penny”
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Chunking
• The process of grouping items to make them easier to remember
• Usually contains information that is of possible interest
• Figure 10.4 “Using Short-term Memory”
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The Primacy-Recency Effect
• Refers to the fact that we are better able to recall information presented at the beginning and end of a list
• The middle is hard to remember because of a “split”; you focus your attention on remembering the previous ones and the rehearsing of the new part of the list
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Long-Term Memory
• Storage of information over extended periods of time
• Must reconstruct what you must recall when you need it
• Contains representations of countless facts, experiences, or sensations
• Prosopagnosia—page 279
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Types of Long-Term Memory
• Semantic memory- knowledge of language, including its rules, words, and meanings
• Episodic memory- chronological retention of the events of one’s life
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Types of Long-Term Memory
• Declarative memory- stored knowledge that can be called forth consciously if needed
• Procedural memory- permanent storage of learned skills that does not require conscious recollection
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Memory Centers of the Brain
• Cortex– Short-term and long-term memory
• Thalamus– Information processing
• Hippocampus– Long-term Memory
• Amygdala– Emotional associations
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The Case of H.M.
• 1953
• H.M. underwent brain surgery in which his hippocampus was removed to ease his epileptic seizures
• His seizures decreased
• His IQ actually rose slightly due to higher concentration levels
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The Case of H.M.
• Doctors discovered that H.M. had lost the ability to store new long term memories
• He could remember events that happened before the surgery
• He could not remember events occurring after the surgery
• H.M.’s brain could not transfer short-term information into long-term memory
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