A lack of statistical significance supports the conclusion that the null hypothesis is true.
Is it true that a lack of statistical significance supports the conclusion that the null hypothesis is true?
No. A lack of statistical significance (a non-significant p-value) only indicates that the data are compatible with the null hypothesis under a specific model, not that the null hypothesis is proven true. Bayesian methods and proper uncertainty quantification are required to actually measure evidence in favor of the null.
Verdict: REFUTED · 0 sources for, 5 against · Last checked
The claim asserts that a lack of statistical significance supports the conclusion that the null hypothesis is true. In statistical theory (particularly frequentist hypothesis testing), failing to reject the null hypothesis is not the same as proving or supporting it; it simply means there is insufficient evidence against it. Furthermore, modern methodological papers (e.g., papers 0, 2, 8) emphasize that non-significant p-values can be inconclusive and that confirming a null hypothesis requires proper Bayesian analyses (like Bayes factors) rather than merely failing to reach p < 0.05. Therefore, the claim is refuted by statistical consensus.
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MHL, F., LC, C., & NC, J. (2026). Beyond the p Value Dichotomy: Alternatives for Statistical Inference-A Critical Review.. doi.org. https://doi.org/10.1111/jep.70373
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MK, H., AJ, R., G, M., & I, B. (2026). Exploring the proper use of <i>p</i>-values and confidence intervals in leading epidemiology journals.. doi.org. https://doi.org/10.1016/j.gloepi.2026.100247
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J, G., T, T., K, K., Y, Y., Y, C., Y, F., R, C., F, L., Y, Z., & Y, W. (2026). A Bayesian reevaluation of randomized controlled trials in assisted reproductive technology: quantifying evidence strength for null and alternative hypotheses.. doi.org. https://doi.org/10.3389/fendo.2026.1860725
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M, K. (2026). The Fragility of Significance: Why P-values and the Fragility Index Are Not Enough.. doi.org. https://doi.org/10.1007/s13193-026-02531-9
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TM, E., L, M., N, R., N, Y., DJ, S., E, K., JC, L., & L, T. (2026). Reporting of second-generation <i>p</i>-values, Bayes factors and fragility indices in trials enhances assessment of clinical importance beyond <i>p</i>-values: a meta-epidemiologic study.. doi.org. https://doi.org/10.1016/j.conctc.2026.101667
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