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Tukey's Honestly Significant Difference (HSD) Test
Tukey's honestly significant difference (HSD) test is a statistical procedure used for post hoc comparisons to determine which specific group means differ from one another following a significant one-way ANOVA. It serves as one of several modified -test approaches designed specifically to limit the overall probability of committing a Type I error (mistakenly rejecting a true null hypothesis) when performing multiple pairwise comparisons.
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Research Methods in Psychology - 4th American Edition @ KPU
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Bonferroni Procedure
Fisher's Least Significant Difference (LSD) Test
Tukey's Honestly Significant Difference (HSD) Test
Why do researchers use modified t-test procedures, such as the Bonferroni procedure or Tukey's honestly significant difference (HSD) test, rather than standard t-tests when conducting post hoc comparisons?
If a researcher decides to use standard t-tests rather than modified t-test procedures for multiple post hoc comparisons, they will successfully keep their overall risk of mistakenly rejecting a true null hypothesis at an acceptable level.