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Ecology
Article
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ZENODO; Ecology
Article . 2014 . Peer-reviewed
License: Wiley Online Library User Agreement
Data sources: ZENODO; Crossref
Ecology
Article . 2014
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In defense of P values

Authors: Paul A, Murtaugh;
Abstract

Statistical hypothesis testing has been widely criticized by ecologists in recent years. I review some of the more persistent criticisms of P values and argue that most stem from misunderstandings or incorrect interpretations, rather than from intrinsic shortcomings of the P value. I show that P values are intimately linked to confidence intervals and to differences in Akaike's information criterion (ΔAIC), two metrics that have been advocated as replacements for the P value. The choice of a threshold value of ΔAIC that breaks ties among competing models is as arbitrary as the choice of the probability of a Type I error in hypothesis testing, and several other criticisms of the P value apply equally to ΔAIC. Since P values, confidence intervals, and ΔAIC are based on the same statistical information, all have their places in modern statistical practice. The choice of which to use should be stylistic, dictated by details of the application rather than by dogmatic, a priori considerations.

Subjects by Vocabulary

Microsoft Academic Graph classification: Ecology Data interpretation Confidence interval Significance testing Econometrics A priori and a posteriori p-value Akaike information criterion Null hypothesis Mathematics Statistical hypothesis testing

Keywords

Models, Statistical, Research Design, Data Interpretation, Statistical, Ecology, Evolution, Behavior and Systematics

32 references, page 1 of 4

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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impulse
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