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Fixed or random? On the reliability of mixed‐effects models for a small number of levels in grouping variables

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Oberpriller, Johannes ; de Souza Leite, Melina ; Pichler, Maximilian
Date of publication of this fulltext: 09 Nov 2022 11:34


Biological data are often intrinsically hierarchical (e.g., species from different genera, plants within different mountain regions), which made mixed-effects models a common analysis tool in ecology and evolution because they can account for the non-independence. Many questions around their practical applications are solved but one is still debated: Should we treat a grouping variable with a low ...


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