I am trying to fit a three-level model with lme4, I got familiar with the notation about equation. But I am not able to express the random effects properly in level two and three, I have:
- on level two: random intercept
- on level three: random intercept and random slope
For example in:
time | therapist / subjects
How can I drop random slope on level two only while having both random slopes and intercepts on level three?