An estimate of the continuing memory span for digits was obtained by having Ss reproduce a sequence of digits after a fixed delay. By this technique, the continuing memory span is only about three digits. The span decreases with rate of digit presentation and is relatively constant between 2 and 4 alternatives per digit.
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References
1.
KerwinE. M.LickliderJ. C. R.Continuous memory span for binary data. Quart. Progress Rep., Acoustics Lab., Mass. Inst. Tech. October-December, 1951.
