When you take the survey they say its anonymous, you don't have to give your name and no one will know who you are. But then they ask questions like "whats your store number" , "what department do you work in", how many years have you worked at Target"' etc etc. By the time you answer all these personal questions they could figure out EXACTLY who you are!
Except those specifics don't get reported at an individual level. The store only gets a total executive or total hourly report. They have a vendor that runs the survey process who maintains the confidentiality.