Dear friends,
this time I have a problem with using waba function. Firstly, I'll explain you my situation.
In the survey a gruop of supervisors judge the dipendents of a company. 
One supervisor reported on more than one subordinate. 
Thus, I need to show that lack of independence is not a problem, and a reviewer told me to use WABA.
The question is, how? In which way i can build my X and Y? I've understand that i need a variable group (supervisor), but i didn't understand how i can prove that judgement are indipendent from the supervisor.
Another specification: supervisors reply to 12 items about each worker, and i have more than 15 supervisors, and ones of them judges only few workers, and others ones judges a very big quantity of workers.
The reviewer also told me that another approach is use multilevel modeling (HLM), but i really don't know how i can do it.
 
Hoping to have so many replies earlier, i wish you the best.
 
Costantino Milanese
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