forgetting an inability to retrieve from ltm. but is forgetting necessarily a retrieval failure?...
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Forgetting
An inability to retrieve from LTM
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But is forgetting necessarily a retrieval failure?
• “RetrievaI failure” implies the information is there and just not accessible.
• Was it inadequately stored, or learned, when we acquired it?
• Has it actually decayed with time?
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Important questions, because we would like to know
• How might we minimize forgetting?
• How can we remember what we wish and forget what we’d rather forget?
• Should we attempt to interfere with forgetting, or does forgetting serve an essential purpose?
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Hermann Ebbinghaus
• In 1885, using himself as subject, studied forgetting, using nonsense syllables (why?)
• Plotted a forgetting curve, testing himself at various intervals after learning, and found that memory did decline with time passage
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I. Transience
Pattern of forgetting over time
• Early theorists suggested that decay of memories accounts for forgetting
• Some evidence does suggest that unused memories are forgotten.
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Interference
• Recent research suggests much more forgetting occurs due to Interference
• Proactive Interference: Previously learned information inhibits our ability to remember new information
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• Retroactive Interference: New information inhibits our ability to remember old information
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• Especially potent when retrieval cues are identical or very similar
(e.g., learning new/forgetting old locker combinations)
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II. Blocking
Temporary inability to retrieve something known
Very common: forgetting the name of a CD, someone’s name you know, etc.
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TOT Phenomenon
• Experienced as inability to recall a fact, word, name, etc., that we are absolutely certain we know and have stored in LTM;
The memory is temporarily inaccessible.
For example,
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>Patronage bestowed on a relative, in business or politics is
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• Often due to interference from words similar in sound, number of syllables, 1st letter, etc.: they keep recurring as we try to remember target word
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>An astronomical instrument for finding position is
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III. Absentmindedness
Inattentive or shallow encoding of events
Where your keys are, name of person you just met, whether you took your vitamins, etc.
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• Described as explaining “change blindness” – inability to detect changes to an object or scene
• Well-known example: individual asking directions “changes” to another person
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Amnesia
• Extreme forgetting: inability to retrieve vast quantities of information from LTM
• Anterograde and retrograde