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Impact of Shared Flaws on Research Conclusions

When evaluating a body of research, if multiple studies supporting the same conclusion all share similar methodological weaknesses, it undermines confidence in that conclusion. For instance, if all studies are correlational, consistent outcomes might simply be an artifact of a shared vulnerability, such as the third-variable problem, rather than a genuine effect.

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Updated 2026-05-04

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Research Methods in Psychology - 4th American Edition @ KPU