By Nelson Butters
• Edit date: 1980 • writer: educational Press. Inc • ISBN: 0-12-148380-0 • writer: Nelson Butters/Laird S. Cermak • Preface/Forward: through the authors • No. Pages: 188
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Additional resources for Alcoholic Korsakoff's Syndrome. An Information-Processing Approach to Amnesia
Not all items are incorrectly perseverated, however, and when a correct item does attain long-term status, it seems to be retained. T o further demonstrate this fact, Cermak, Butters and Goodglass (1971) taught their Korsakofï patients a six item P-A list. In their task, each patient was asked to learn P-A's in which the members of each pair were unrelated monosyllabic words. A maximum of 16 trials was given to each patient, but testing ended if a patient successfully produced a correct response for each stimulus on 2 consecutive trials.
1 The graph illustrates the mean number of trials required to learn particular items on successive days, and contrasts those items learned correctly (C) by alcoholic Korsakoff patients on Day 1 with those that remained incorrect (I). The same matched items are plotted for the alcoholic controls. portion of their initial learning experience had been retained, presumably in LTM because at least 1 day had passed since original learning. Warrington and Weiskrantz (1976) also demonstrated this phenomenon using a task in which the first few letters of a word were used to prompt retrieval of the whole word.
1). This led them to their conclusion that decay was the principle cause of forgetting in STM. The error of their assumption was quickly pointed out by Keppel 22 2. 2 0 3 6 9 12 Recall interval (sec) 15 18. 83 sec as a function of the recall interval. and Underwood (1962), who showed that the Petersons had overlooked an important source of "interference" in their design, namely, the PI that accrued from items presented on preceding trials. Keppel and Underwood argued that because the Petersons had given their subjects several practice trials before initiating their testing procedure, a good deal of PI had been generated prior to the point at which they began to collect data.
Alcoholic Korsakoff's Syndrome. An Information-Processing Approach to Amnesia by Nelson Butters