The Scheffé test controls for doing multiple comparisons by using a lower alpha level than was used in the ANOVA.

Name: The Scheffé test controls for doing multiple comparisons by using a lower alpha level than was used in the ANOVA.
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The Scheffé test controls for the familywise error rate in multiple comparisons by using a method that is generally more conservative than simply lowering the alpha level; it does not lower the alpha level used in the initial ANOVA.

The Scheffé Test Controls for Doing Multiple Comparisons by Using