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The 28:1 Grant/Sackman legend is misleading, or: How large is interpersonal variation really?

Prechelt, Lutz

Abstract: How long do different programmers take to solve the same task? In 1967, Grant and Sackman published their now famous number of 28:1 interpersonal performance differences, which is both incorrect and misleading. This report presents the analysis of a much larger dataset of software engineering work time data with respect to the same question. It corrects the false 28:1 value, proposes more appropriate metrics, presents the results for the larger dataset, and presents results of several further analyses: distribution shapes, effect sizes, and the performance of various significance tests.


Zugehörige Institution(en) am KIT Institut für Programmstrukturen und Datenorganisation (IPD)
Publikationstyp Forschungsbericht
Jahr 1999
Sprache Englisch
Identifikator ISSN: 1432-7864
URN: urn:nbn:de:swb:90-AAA726992
KITopen ID: 72699
Verlag Karlsruhe
Serie Interner Bericht. Fakultät für Informatik, Universität Karlsruhe ; 1999,18
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