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PureSpectrum offers its buyers the ability to recontact respondents using their persistent PureSpectrum Id (PSID). The same mechanism is also used by suppliers to understand which respondents to exclude due to deduplication.
Implementation
Every survey on PureSpectrum has a "PSIDRef" List. Whether this list is used for Include or Exclude is determined by the response parameter incl_excl present in the `GET /Surveys` and `GET /Surveys/:Survey_id` call. The value of Include Exclude will not change for a survey which has been already set live.
| Info |
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"incl_excl": 0 indicates PSIDRef is an exclude list (default) "incl_excl": 1 indicates PSIDRef is an include list |
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