Download Alcoholic Korsakoff's Syndrome. An Information-Processing by Nelson Butters PDF

By Nelson Butters

• Edit date: 1980 • writer: educational Press. Inc • ISBN: 0-12-148380-0 • writer: Nelson Butters/Laird S. Cermak • Preface/Forward: by way of the authors • No. Pages: 188

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Extra info for Alcoholic Korsakoff's Syndrome. An Information-Processing Approach to Amnesia

Sample text

This implies that the "preactivation" described by Collins and Loftus (1975) is probably nothing more than normal memory for a recently completed search. The results from these studies on semantic memory raise two important points in addition to those already cited. First, although the alcoholic Korsakoff patients' search of semantic conceptual memory is slower than normal (indicating perhaps an element of disorganized search), nevertheless, they did respond correctly as often as the normals. This again means that information learned early in life is still present and may be available as a base from which to draw inferences (see Lachman & Lachman, 1979).

The patients' STM capacity remains nearly normal, but their LTM capacity seems to be completely depleted. Thus, these patients can "retain" only a small amount of continually rehearsed material and are not able to chunk it into bits, nor can they transfer it into a more permanent storehouse (LTM). This existence of an intact processing system (STM) in the presence of a totally deficient storage system (LTM) has been used as evidence that STM and LTM must represent two independent storage systems.

2 The graph illustrates the decay of available information (items recalled) using partial report as a function of the delay of the recall cue (tone). have shown that the trace (or icon) produced during the brief presentation interval not only decays rapidly, but can be interfered with as well. In the Averbach and Coriell experiment, two rows of eight letters each were presented to the subject for 50 msec. A circle appeared 50200 msec later and the subject's task was to name the letter that had appeared within the area outlined by the circle.

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