How To Override Default Statistical Testing Settings

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By default, Q automatically takes into account the structure of the data when determining how to perform tests.

There are a number of situations where it can be useful to override these defaults:

  1. When it is desired to show Column Comparisons (i.e., letters, rather than arrows and colors).
  2. Controlling which specific columns should be compared. For example, see:
  3. When attempting to reproduce results computed from other programs. See Results Are Different to those from Another Program.
  4. With very small sample sizes it can be useful to turn off Multiple Comparison Corrections and/or increase the Overall significance level.
  5. Where there are serious missing data problems in repeated measures data. See Column Comparisons With Missing Repeated Measures Data.