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Short term memory bowing effect is consistent with presentation rate dependent decay

Eugen G Tarnow  January 2 2011 09:09:13 PM
Short term memory bowing effect is consistent with presentation rate dependent decay
Cognitive Neurodynamics 2010, 4(4), 367.

I reanalyze the free recall data of Murdock, J Exp Psychol 64(5):482–488 (1962) and Murdock and Okada, J Verbal Learn and Verbal Behav 86:263–267 (1970) which show the famous bowing effect in which initial and recent items are recalled better than intermediate items (primacy and recency effects). Recent item recall probabilities follow a logarithmic decay with time of recall consistent with the tagging/retagging theory. The slope of
the decay increases with increasing presentation rate. The initial items, with an effectively low presentation rate, decay with the slowest logarithmic slope, explaining the primacy effect. The finding that presentation rate limits the duration of short term memory suggests a basis for memory
loss in busy adults, for the importance of slow music practice, for long term memory deficiencies for people with attention deficits who may be artificially increasing the presentation rates of their surroundings. A well-defined,quantitative measure of the primacy effect is introduced.
http://www.springerlink.com/openurl.asp?genre=article&id=doi:10.1007/s11571-010-9131-z
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