How Subtle Protocol Choices Can Affect Biological Conclusions: Great Tits' Response to Allopatric Mobbing Calls

In the last ten years, numerous replicated studies showed divergent results from the original papers, leading to the recognition that science may be facing a replication crisis. Apart from fraud or natural population variability, different results may emerge from flexibility in the protocol and/or r...

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Main Authors: Ambre Salis, Jean-Paul Lena, Thierry Lengagne
Format: Article
Language:English
Published: Animal Behavior and Cognition 2021-05-01
Series:Animal Behavior and Cognition
Subjects:
Online Access:http://animalbehaviorandcognition.org/article.php?id=1260
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author Ambre Salis
Jean-Paul Lena
Thierry Lengagne
author_facet Ambre Salis
Jean-Paul Lena
Thierry Lengagne
author_sort Ambre Salis
collection DOAJ
description In the last ten years, numerous replicated studies showed divergent results from the original papers, leading to the recognition that science may be facing a replication crisis. Apart from fraud or natural population variability, different results may emerge from flexibility in the protocol and/or restricted sample sizes. Replication studies are therefore fundamental to assess how robust a finding can be. However, while the original authors may be prone to p-hacking (to collect data, select data or use statistical analyses until nonsignificant results become significant), the replication-authors are, on the contrary, probably unwittingly prone to show opposite results (i.e., null-hacking). In this study, we face the unique opportunity to compare replicated studies with no null-hacking bias. Two teams independently investigated the response of great tits (Parus major) to mobbing calls of an allopatric species, in their natural and reversed order, on the same population. We first discuss how subtle protocol choices, especially regarding the soundtrack preparation and playback methodology, can explain variation in the results. In addition, we show that, although the effect sizes of the differences of interest are similar, biological conclusions solely based on the p-value would be different. Thus, we note the pitfall of reliance on p values, especially with small samples.
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spelling doaj.art-2c6b26c8f59e4ed2bfe26826633b1ea82022-12-21T22:11:43ZengAnimal Behavior and CognitionAnimal Behavior and Cognition2372-50522372-43232021-05-018215216510.26451/abc.08.02.05.2021How Subtle Protocol Choices Can Affect Biological Conclusions: Great Tits' Response to Allopatric Mobbing CallsAmbre SalisJean-Paul LenaThierry LengagneIn the last ten years, numerous replicated studies showed divergent results from the original papers, leading to the recognition that science may be facing a replication crisis. Apart from fraud or natural population variability, different results may emerge from flexibility in the protocol and/or restricted sample sizes. Replication studies are therefore fundamental to assess how robust a finding can be. However, while the original authors may be prone to p-hacking (to collect data, select data or use statistical analyses until nonsignificant results become significant), the replication-authors are, on the contrary, probably unwittingly prone to show opposite results (i.e., null-hacking). In this study, we face the unique opportunity to compare replicated studies with no null-hacking bias. Two teams independently investigated the response of great tits (Parus major) to mobbing calls of an allopatric species, in their natural and reversed order, on the same population. We first discuss how subtle protocol choices, especially regarding the soundtrack preparation and playback methodology, can explain variation in the results. In addition, we show that, although the effect sizes of the differences of interest are similar, biological conclusions solely based on the p-value would be different. Thus, we note the pitfall of reliance on p values, especially with small samples.http://animalbehaviorandcognition.org/article.php?id=1260animal communicationheterospecific communicationmobbingreplication crisissyntax
spellingShingle Ambre Salis
Jean-Paul Lena
Thierry Lengagne
How Subtle Protocol Choices Can Affect Biological Conclusions: Great Tits' Response to Allopatric Mobbing Calls
Animal Behavior and Cognition
animal communication
heterospecific communication
mobbing
replication crisis
syntax
title How Subtle Protocol Choices Can Affect Biological Conclusions: Great Tits' Response to Allopatric Mobbing Calls
title_full How Subtle Protocol Choices Can Affect Biological Conclusions: Great Tits' Response to Allopatric Mobbing Calls
title_fullStr How Subtle Protocol Choices Can Affect Biological Conclusions: Great Tits' Response to Allopatric Mobbing Calls
title_full_unstemmed How Subtle Protocol Choices Can Affect Biological Conclusions: Great Tits' Response to Allopatric Mobbing Calls
title_short How Subtle Protocol Choices Can Affect Biological Conclusions: Great Tits' Response to Allopatric Mobbing Calls
title_sort how subtle protocol choices can affect biological conclusions great tits response to allopatric mobbing calls
topic animal communication
heterospecific communication
mobbing
replication crisis
syntax
url http://animalbehaviorandcognition.org/article.php?id=1260
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