For any project type, you can exclude participants who have previously participated in a study with your organization. This can be configured to take any participation history with your organization into account, or just participation over a fixed number of trailing months.

How to set up a participation history filter

  1. Create a project 
  2. Complete Project Set Up
  3. Click "Save and Next" to go to the Audience tab
  4. Under the Filtering section, open the "Past participation" section.

Click here to view general Filtering information. 

FAQs: 

Does the filter apply to completed projects, or anyone who has taken one of our screeners?
Only participants who have been paid by your organization will be affected by the filter.

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