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The magical number 4 = 7: Span theory on capacity limitations
Published online by Cambridge University Press: 30 October 2001
Abstract
According to span theory, a behavioral theory of the magical numbers, Cowan's 4 and Miller's 7 are simply two different points on the same ogive describing the relation between performance and span load, a fundamental task characteristic. Span theory explains the magical numbers in terms of a unitary limited span ability, a mathematical abstraction from that ogive.
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- © 2001 Cambridge University Press
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