Multilevel analysis
Written by Ronny Gunnarsson and first published on August 26, 2015. Last revised on September 8, 2019.
There is an updated version of the EPV-calculator found here: https://infovoice.se/epv-calculator/
(This page is still under construction. Sorry for the inconvenience. )
What is Multilevel Modelling? Start by watching a lecture held by by Mark Tranmer:
VIDEO
Different levels of nesting are put into the model as “random effects”. For each level how many “groups” do you need to have? Usually at least five . It might be a good choice to refrain from multilevel modelling if you have less than five groups on any given level.
Further reading
References
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1.
Harrison XA, Donaldson L, Correa-Cano ME, Evans J, Fisher DN, Goodwin CED, et al. A brief introduction to mixed effects modelling and multi-model inference in ecology. PeerJ [Internet]. 2018 May 23 [cited 2019 Aug 15];6. Available from:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5970551/
There is an updated version of the EPV-calculator found here: https://infovoice.se/epv-calculator/