Essay

Explain the primary criticism that critics raise regarding the standard practice of null hypothesis significance testing with a strict threshold of p<.05p < .05. In your explanation, recall how this threshold affects publication decisions and identify what systemic issue in psychological research is exacerbated by this convention.

Question: Explain the primary criticism that critics raise regarding the standard practice of null hypothesis significance testing with a strict threshold of p<.05p < .05. In your explanation, recall how this threshold affects publication decisions and identify what systemic issue in psychological research is exacerbated by this convention.

Sample answer: Critics argue that the strict threshold of p<.05p < .05 is logically flawed and arbitrary because it creates an artificial divide where a result of p=.04p = .04 is deemed significant and worthy of publication, while a nearly identical result of p=.06p = .06 is dismissed as not significant. This rigid cutoff prevents valuable research from being published and exacerbates the file drawer problem by suppressing non-significant findings.

Key points:

  • The strict p<.05p < .05 threshold is criticized as logically flawed and arbitrary.
  • The threshold creates an artificial divide between statistically significant and non-significant results.
  • Nearly identical results (e.g., p=.04p = .04 and p=.06p = .06) receive opposite publication and scientific value judgments.
  • This practice suppresses valuable research and exacerbates the file drawer problem.

Rubric: A complete response must: 1) state that the p<.05p < .05 threshold is criticized as arbitrary or logically flawed; 2) explain that it creates an artificial divide between nearly identical results (such as p=.04p = .04 and p=.06p = .06); and 3) identify that this suppresses non-significant findings, thereby exacerbating the file drawer problem.

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Updated 2026-05-26

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Research Methods in Psychology - 4th American Edition @ KPU

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