08_Learning_Memory3_forgetting_Presentation

08_Learning_Memory3_forgetting_Presentation - Introduction...

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Click to edit Master subtitle style Introduction to cognitive science Psych 102/COGST 101/LING 170/PHIL 191/ COMS 101
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Possible Causes of Forgetting Retrieval Failure Decay Interference Memory Confidence Forgetting
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What is Forgetting? Possible Causes of Forgetting Possible Causes of Forgetting
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What is Forgetting? We have been looking at memory errors for recent information l another issue in memory is forgetting over time l Retention interval – a common finding in the literature is that memory for distant events is less accurate than memory for more recent events
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Possible Causes of Forgetting Retrieval Failure l Information isn’t lost, we just cant find the retrieval paths to it right now Decay l Over time, memories fade, or erode. l Brain cells die off? l Connections are not refreshed? Interference l New memories get in the way of old memories l Thus over time there have been more
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Retrieval Failure
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Evidence for retreival failure State-dependent learning studies
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Decay
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Evidence for decay Have participants sit and do nothing (not even think) for varying amounts of time and look at memory l Difficult with humans l Easy with cockroaches Train roach with s-r paradigm Place in cold place for varying length on time Test response No changes due to time l Evidence against decay
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Interference
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Evidence for interference If cockroaches are allowed to do stuff between learning and test, memory failure occurs
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Evidence for interference Sleep studies l Potentially during sleep we are not doing too much and thus wont create many new memories to lead to interference l While awake we will create new memories
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This note was uploaded on 02/20/2009 for the course COGST 101 taught by Professor Bienvenue,b during the Spring '08 term at Cornell University (Engineering School).

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08_Learning_Memory3_forgetting_Presentation - Introduction...

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