摘要 |
A system and method for detecting and avoiding attempts at taking the same survey by the same respondent. A respondent is assigned a Global unique identifier (GUID) and the encrypted global identifier is inserted in a "cookie" stored on the user's computer. Each time a respondent attempts to take a survey, a respondent is identified using a mechanism such as e-mail, computer identifier or the like and a Survey Management system checks to see if this respondent should have a global identifier encoded in a cookie. Based on this review, the Survey Management system can determine whether or not this particular user, whether using different computer systems or under different user accounts has previously taken the survey.
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