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  1. S

    Strong linear correlation in residual plot of LME - Reasons and solutions?

    Thanks a lot for your answer katxt! I think you are right and I might have found the problem. I chose a mixed model assigning 'patient' as a random effect to account for within patient repeated measures in the training cohort but then predicted the outcome on an independent cohort of new...
  2. S

    Strong linear correlation in residual plot of LME - Reasons and solutions?

    I am using MATLAB with a self written script... Context and variables are unfortunately quite complicated and explaining in detail will open up more questions than it will close, I am afraid. In short I am predicting a clinical outcome based on continuous electrophysiological predictor variables...
  3. S

    Strong linear correlation in residual plot of LME - Reasons and solutions?

    Outcome is predicted value... Bad labelling here from my side I admit :)
  4. S

    Strong linear correlation in residual plot of LME - Reasons and solutions?

    Hi everyone, I am currently performing model analysis on a linear mixed model (4 fixed and 1 random effect) and observed a strong linear correlation in the residual plot (see below). Does anyone have any suggestions on how to adapt the model (transforming variables/introducing link functions...