This allows a cookie to be set on the participants’ machines. A cookie is a small piece of data sent from the survey website and stored on the participants’ web browsers while the participants are browsing that website. For unauthenticated survey sessions this feature allows two things:
1. Allows participants to resume interrupted surveys where they left off by clicking on the survey link. This feature will not work for participants using security software that prevents cookies from being saved.
2. Prevents multiple submissions (or “stuffing the ballot box”) by the same computer. Multiple submissions are prevented unless cookies are deleted from the survey participant’s computer. This option is not recommended in situations where a fairly high percentage of survey participants are expected to use computers in the same shared computing environments.