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The 28:1 Grant/Sackman legend is misleading, or: How large is interpersonal variation really? (1999)
| Citations: | 14 - 2 self |
BibTeX
@MISC{Prechelt99the28:1,
author = {Lutz Prechelt},
title = {The 28:1 Grant/Sackman legend is misleading, or: How large is interpersonal variation really?},
year = {1999}
}
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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.
