mixed effect model

Hi! We have performed an experiment to see if semi-wild pigs have any food preferences (in what type of nutrient supplement we add to the food). Different foods were added in their home range at each their place. After each trial we counted the number of food pellets that were eaten. So...at...

Hi everyone, I need some advice regarding nested effects. My data set has the following variables: HeatingRate = dependent variable Individual (n = 4) = fixed Temperature gradient (n = 3) = fixed Trial (n = 3 per temperature gradient per individual) = random I'm interested in knowing whether...

I'm trying to run a generalized linear mixed model in SPSS, with a continuous response variable (ResponseTime), SubjectID as a random factor, Items as a repeated measure, and five fixed factors: three categorical subject variables (Sex, Handedness, Familial Handedness) and two categorical item...

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I have a basic doubt on when to use country code as dummy coded control variables in regression and when to model it as a higher level variable within which other independent variables are nested. In my specific study, I have borrowers from several countries using an online P2P portal for...

I keep getting error messages:' The levels of the repeated effect are not different for each observation within a repeated subject.' Can anyone offer me some advice whether I can perform Mixed Effect Model in SPSS with my data or I have organised my data correctly? I have two groups of...