

Dear all, I am running an lmer model using repeated measures (scores on various school subjects) per student as a dependent variable. The students are a random effect. My problem is that the dependent variable is not beatifully normal (there seems to be a ceiling effect). The plot of residuals is not clearly problematic, neither clearly reassuring. I am inclined to decide that the extend of the violation is not too threatening, but I would love to use a more formal method (to complement my professional judgment) to reassure the reviewers of the sudy that they should not worry too much about the reliability of the model. In such a case, does anyone know any lme4 method (e.g. a monte carlo technique) to reassure me that the violations are not major and that my model is reliable?

Thank you for your time

Jason

 
Dr. Iasonas Lamprianou
Department of Social and Political Sciences
University of Cyprus



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