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question sheet 6 - 830:311H CONDITIONING AND LEARNING...

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830:311H CONDITIONING AND LEARNING Question Sheet 6, Chapter 5 Essay: 1. The information-processing account of memory processing (fig., p. 124) suggests the basic sources of forgetting. What are they, and how could you test these accounts experimentally? The Information-processing account suggests that forgetting may occur because of loss in translation from sensory memory to short-term memory or from long-term memory to short- term memory. Proactive/retroactive interference: old/new memories somehow interfere with access to new/old memories – 2 word lists to remember, first interferes with second and vice-versa. Retrieval failure: information may remain available in memory but needs to be cued by context – scuba divers given word list to memorize underwater and tested in dry context. Forgetting caused by passage of time or context change may be alleviated with reminder. 2. Pavlov said that all learning is permanent, but the R-W model says it is not. Discuss the evidence from research on extinction that supports Pavlov's argument. R-W model assumes that extinction brings surprisingness of US down to zero, and thus that extinction destroys the original learning. Contrary to this model, spontaneous recovery (renewal of response to the CS, outside of extinction’s temporal context) and renewal effect (context-dependent recovery of learning) indicate that extinction does not destroy original learning Suppression measured in 2 groups of rats who receive CS-shock pairings; measured again in Phase 2, this time on extinction trials, where one group is in the learning context (“Ext-A”) and the other is in a novel context (“Ext-B”); when both groups were returned to the learning context, Ext-B recovered suppression response extinction performance depends partly on being in the extinction context and renewal may be caused by the failure of inhibitory link to activate outside of extinction context.
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