has part is about is model for has fixed effect on study design independent variable study design dependent variable fixed effect model 2 Orlaith Burke Alejandra Gonzalez-Beltran PRS: this is a stub and more work is needed to reconcile conflicting definitions Philippe Rocca-Serra a fixed effect model is a statistical model which represents the observed quantities in terms of explanatory variables that are treated as if the quantities were non-random. adapted from wikipedia: http://en.wikipedia.org/wiki/Fixed_effects_model statistical model model fixed effect term model interaction effect term model error term requires discussion