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Not null enough: pseudo-null hypotheses in community ecology and comparative psychology

Accepted version
Peer-reviewed

Type

Article

Change log

Authors

Halina, M 

Abstract

We evaluate a common reasoning strategy used in community ecology and comparative psychology for selecting between competing hypotheses. This strategy labels one hypothesis as a “null” on the grounds of its simplicity and epistemically privileges it as accepted until rejected. We argue that this strategy is unjustified. The asymmetrical treatment of statistical null hypotheses is justified through the experimental and mathematical contexts in which they are used, but these contexts are missing in the case of the “pseudo-null hypotheses” found in our case studies. Moreover, statistical nulls are often not epistemically privileged in practice over their alternatives because failing to reject the null is usually a negative result about the alternative, experimental hypothesis. Scientists should eschew the appeal to pseudo-nulls. It is a rhetorical strategy that glosses over a commitment to valuing simplicity over other epistemic virtues in the name of good scientific and statistical methodology.

Description

Keywords

Null hypothesis, Community ecology, Neutral theory, Comparative psychology, Mindreading hypohesis, Reasoning strategy

Journal Title

Biology and Philosophy

Conference Name

Journal ISSN

0169-3867
1572-8404

Volume Title

33

Publisher

Springer Science and Business Media LLC
Sponsorship
Leverhulme Trust (RC-2015-067)
Leverhulme Centre for the Future of Intelligence