Your Right To Be Liberal Or Conservative

As we pointed out near the outset of this chapter, the various post hoc procedures differ in terms of how liberal or conservative they are. Ideally, a researcher ought to choose among these procedures after considering the way they differ in terms of power and control of Type I errors. Realistically, however, the decision to use a particular test procedure is probably influenced most by what computer programs are available for doing the data analysis or by what procedure was emphasized in a specific textbook or by a specific instructor.

Regardless of the reasons why the researcher chooses to use a particular test procedure, you are in full control of how you interpret the results presented in the research report. If a researcher uses a test procedure that is too liberal or too conservative for your taste, remember that you have the undisputed right to accept only a portion of the researcher's full set of conclusions. Or, you may want to reject everything that is "discovered" in the research study because your position on the liberal/conservative continuum is quite different from that of the researcher who performed the data analysis.

(From Chapter 13, pp. 376-377)

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Schuyler W. Huck
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