PBL,
If you start the survey you will be asked some basic information such as what type of licence you have.
In case you are wondering though, it's open for pilots PPL and up, although some questions are more suited for airline pilots. For controllers, I'd prefer answers from operational controllers; whether or not they are students they should at least have experience from talking to real pilots.
Since you seem to have a better grasp of the ins and outs of making a survey, I've sent you a PM.
