When you launch an Opinion Survey you have two options with respect to anonymity.

  1. You can make them so that they're completely anonymous - without anybody being able to identify the responses
  2. You can make them so that only users with the "Opinion Survey" privilege can identify the responses

To apply the appropriate setting, see the image below which illustrates how to set up the proper anonymity setting:

And the following image shows you how to set the appropriate privilege for a user: