Hi everyone,
I've just converted from SPSS to STATA, and was just wondering if anyone knew how to model interactions between random effects in mixed-effect models.
In my design, I have two within-subject factors for every subject (day, and trial blocks within each day) and I modeled this interaction in SPSS using:
/RANDOM = intercept day*block | SUBJECT(subject_ID) COVTYPE(UN)
But I can't seem to find out how to model this same interaction in STATA, as I can only specify each random effect separately:
|| Subject_ID: Day Block, covariance(unstructured)
I just started using STATA so any help would be awesome!
Cheers,
Al
I've just converted from SPSS to STATA, and was just wondering if anyone knew how to model interactions between random effects in mixed-effect models.
In my design, I have two within-subject factors for every subject (day, and trial blocks within each day) and I modeled this interaction in SPSS using:
/RANDOM = intercept day*block | SUBJECT(subject_ID) COVTYPE(UN)
But I can't seem to find out how to model this same interaction in STATA, as I can only specify each random effect separately:
|| Subject_ID: Day Block, covariance(unstructured)
I just started using STATA so any help would be awesome!
Cheers,
Al
