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Aucb.1022 fa.editor-p utzoo!decvax!ucbvax!C70:editor-people Wed May 5 09:08:10 1982 thoughts on a vi quiz >From decvax!ittvax!grimes@Berkeley Wed May 5 09:03:10 1982 I enjoyed your (ucdvax!sdcsvax!draper) reply to bill's quiz (which I have not seen, since I just signed up for this newsgroup).

It may be obvious, but Tom Moran, and Stu Card of PARC have developed and verified a keystroke-level model such as you describe, in particular, it incorporates the 'mental' time which you so correctly point out is critical to the productivity issue. Their work has been published in CACM in the July, 1980 issue pp. 396-410. A later, related work was published in the Human Factors in Computer Systems conference by Terry Roberts (held Mar 15-17 1982 in Gaithersberg, MD) on page 136.

..................jack decvax!ittvax!grimes

[Editor's note: See also

Card, S. K., Moran, T. P. & Newell, A. Computer text editing: An information-processing analysis of a routine cognitive skill. Cognitive Psychology, 1980, 12(1), 32-74. Rumelhart, D.E. & Norman, D.A. Simulating a Skilled Typist: A study of skilled cognitive-motor performance (Tech. Rep.). University of California, San Diego, 1981. Rumelhart, Norman, and their colleagues at UCSD have a competing model to that of Moran and Card. Interested readers should compare their results. --JQJ ]

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