|
I have several
repeated measures which were collected over time in a sample of controls.
I began my analysis with a simple within-subjects repated measures ANOVA.
Now I want to allow for different covariance structures and random
factors. In SPSS, I specified a mixed model and began by specifying a
random intercept but received the error “the covariance structure for the
random effect with only one level will be changed to identity.” Is
this an warning that I should be worried about? I am
attempting to allow the intercept to vary between subjects. Thus, it
would be a simple 2-level random intercept model. My guess is that this
error message is simply telling me that the intercept is not estimated from the
model rather it is directly observed from the baseline values. Jeff |
