In all likelihood, you have used a Likert scale (or something you’ve called a Likert scale) in a survey before. It might surprise you to learn that Likert scales are a very specific format and what you have been calling Likert may not be. Not to worry — researchers that have been doing surveys for… Read More »
How to Prevent Duplicate Responses
Available to Professional, SurveyGizmo, Enterprise, and Dedicated Accounts
There are many choices when it comes to restricting your survey or project to one response per survey taker. This is very important when you are using the tool for voting or elections or other highly-sensitive surveys.
- Go to the Project tab-->Settings.
- Click on the Duplicates tab and choose your type:
- Cookie Based - Prevent duplicates with a browser cookie, allowing for one response per computer. Some users don't accept cookies, or may delete their cookies, defeating this approach.
- IP Based - Not good in corporate/shared IP environments. Blocks all but the first 1 user(s) from from taking your survey.
- None
- Customize your duplicate message and click on Save Settings.
Using email invites with save and continue is another form of duplicate protection. The duplicate message will not be shown to survey takers using the sguid method (or save and continue email invites). They will always go to the Thank You page.
UPDATED: 05/14/2012
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