Using repeatability to study physiological and behavioural traits: ignore time-related change at your peril
Using repeatability to study physiological and behavioural traits: ignore time-related change at your peril
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DOI：
10.1016/j.anbehav.2015.04.008
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发表时间：
2015-07-01
期刊：
影响因子：
2.5
通讯作者：
Stamps, Judy A.
中科院分区：
文献类型：
--
作者：
Biro, Peter A.;Stamps, Judy A.
广义可重复性，指的是个体在特征得分上的差异随着时间的推移而保持的程度，越来越受到研究行为或生理特征的研究人员的关注。广义可重复性最常由统计量R(组内相关，或狭义可重复性)推断。然而，R忽略了随时间的变化，尽管数据具有固有的纵向性质(随时间重复测量)。在这里，我们首先表明，大多数研究在估计广义可重复性时忽略了与时间相关的变化，并以较低的统计能力估计R。鉴于这个问题，我们(1)概述了忽视与时间相关的分数变化(无论是什么原因)如何以及为什么会严重影响对行为或生理特征的广义重复性的估计，(2)讨论各种R指数能够或不能提供对广义重复性的可靠估计的条件，以及(3)为未来的研究提供实验设计建议。最后，鉴于我们已经有大量的证据表明，许多不稳定的特征在广义上是“可重复的”(即R>；0)，我们建议将重点转移到获得行为和生理特征的可重复性的稳健估计上。考虑到这些特征是多么不稳定，这将需要更大的实验(和/或统计)控制和更大的样本量，以便检测和量化随时间的变化(如果存在)。(C)2015年动物行为研究协会。爱思唯尔有限公司出版。保留所有权利。
Broad sense repeatability, which refers to the extent to which individual differences in trait scores are maintained over time, is of increasing interest to researchers studying behavioural or physiological traits. Broad sense repeatability is most often inferred from the statistic R (the intraclass correlation, or narrow sense repeatability). However, R ignores change over time, despite the inherent longitudinal nature of the data (repeated measures over time). Here, we begin by showing that most studies ignore time-related change when estimating broad sense repeatability, and estimate R with low statistical power. Given this problem, we (1) outline how and why ignoring time-related change in scores (that occurs for whatever reason) can seriously affect estimates of the broad sense repeatability of behavioural or physiological traits, (2) discuss conditions in which various indices of R can or cannot provide reliable estimates of broad sense repeatability, and (3) provide suggestions for experimental designs for future studies. Finally, given that we already have abundant evidence that many labile traits are 'repeatable' in that broad sense (i.e. R > 0), we suggest a shift in focus towards obtaining robust estimates of the repeatability of behavioural and physiological traits. Given how labile these traits are, this will require greater experimental (and/or statistical) control and larger sample sizes in order to detect and quantify change over time (if present). (C) 2015 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.