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Published byBaldwin Freeman Modified over 8 years ago
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Memory
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The persistence of learning over time. Nondeclarative memory –Perceptual –Procedural –Stimulus-response Declarative memory –Episodic –Semantic
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Memory Encoding Storage Retrieval
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3-stage memory model Sensory memory - limited sensory record Short-term memory - active encoding Long-term memory - encoded and stored
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Updates to the 3 stage model Some information is automatically encoded Working memory - instead of short-term memory –Processes new information –Utilizes and modifies previously stored memories –“Active” component of memory
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Encoding Processing information into memory How we encode –Automatic encoding Space Time Frequency –Effortful encoding Rehearsal
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Ebbinghaus The amount of information remembered depends on the amount of time spent learning
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Effects on encoding Serial position effect –Primacy –Recency Spacing effect
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Encoding What we encode –Semantic encoding –Visual encoding –Organization Chunking Hierarchies
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Mnemonic devices Cues to prompt memories –Visual –Acoustic –Organizational
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Storage Retention of memories in the brain –Sensory memory –Working memory –Long-term memory
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Sensory memory Trace of sensory information –Remains in the sensory system momentarily –May be encoded into a short-term memory Iconic memories - visual –½ second –Sperling Echoic memories - auditory –3-4 seconds
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Sperling’s studies of sensory memory Sensory memory capacity is large, but limited by time The longer the delay, the greater the memory loss.
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Working memory The mid-stage of memory storage –Short-term memories + recalled long-term memories –We are consciously aware of our memories and can work with them at this stage Sensory memories short-term memories –Incoming memories must be rehearsed to be maintained
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Working memory Working memory has a limited capacity –7 +/- 2 pieces of information –20 seconds Capacity extended by –Chunking –Rehearsal
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Long-term memory Encoded and stored memories Essentially unlimited capacity
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Storing memories Formation of long-term memories relies on neural changes –Long-term potentiation –Not an exact replica –Not located in one spot in the brain –Brain damage has varying impact, due to the nature of memory storage
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Memory and stress High stress and strong emotions fuel brain activity Flashbulb memories –Reliable –Not completely infallible
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Where are memories made?
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