van de Pol, MartijnWright, Jonathan2015-12-100003-3472http://hdl.handle.net/1885/63333Keywords: adaptation; ecological modeling; heterogeneity; hypothesis testing; reaction norm adaptive hypothesis; ecological fallacy; hierarchical model; hypothesis testing; individual heterogeneity; multilevel data; random effect; reaction norm; repeated measure; within-group centeringA simple method for distinguishing within- versus between-subject effects using mixed models200910.1016/j.anbehav.2008.11.0062016-02-24