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by redbar0n 2170 days ago
Did the non-TDD team do regular testing, or no testing at all? It doesn't say, and it seems rather important to judge the results..

I think the debate is not whether testing in general reduces defects (which is rather obvious), but if adhering to a stringent Test-Driven Development (TDD) process is better than regular testing (typically adding the tests after writing the code, instead of before).