Multiple Testing Correction

This drop-down menu enables you to apply multiple testing corrections for testing multiple hypotheses.

Available options are described in the table below:

Multiple Testing Correction Method 1	Definition
(blank space)	• Select this option for no p-value correction.
Bonferroni	• Specifies that the Bonferroni adjustments (number of tests p -value) be computed for each test. • Note : These adjustments can be extremely conservative and should be viewed with caution.
FDR	• Requests adjusted p -values by using the linear step-up method of Benjamini and Hochberg (1995) 2 . • These p -values do not control the familywise error rate, but they do control the false discovery rate in some cases.
Sidak	• Computes the Šidák adjustment for each test. • Note : These adjustments are slightly less conservative than the Bonferroni adjustments, but they still should be viewed with caution.

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1

The Bonferrono and Šidák methods are modifications of the FDR method.

2

Benjamini, Y. and Hochberg, Y. (1995). Controlling the False Discovery Rate: A Practical and Powerful Approach to Multiple Testing. Journal of the Royal Statistical Society, B 57: 289–300.

To Specify a Multiple Testing Correction:

Make a selection using the drop-down menu.

For Additional Information

Refer to p-Value Adjustments for more details about each of these methods.