Postprint version. Published in Companion of the 18th Annual ACM SIGPLAN Conference on Object-oriented Programming, Systems, Languages, and Applications, October 1, 2003, pages 298-299.
Copyright © 2001 by the authors. This is the author's version of the work. It is posted here by permission of ACM for your personal use. Not for redistribution. The definitive version was published in Companion of the 18th Annual ACM SIGPLAN Conference on Object-oriented Programming, Systems, Languages, and Applications and is available at http://dx.doi.org/10.1145/949344.949421.
NOTE: At the time of publication, the author David Janzen was not yet affiliated with Cal Poly.
A Spring 2003 experiment examines the claims that test-driven development or test-first programming improves software quality and programmer confidence. The results indicate support for these claims and inform larger future experiments.