What is the primary function of Survey Authentication in Qualtrics?

The primary function of Survey Authentication in Qualtrics is to verify the identity of respondents. This feature is essential for ensuring that the data collected is reliable and valid, particularly in situations where participant authentication is crucial, such as in research studies that require unique responses or where participant eligibility must be confirmed. By implementing authentication measures, researchers can control access to the survey, thereby preventing unauthorized participants from responding. This increases the integrity of the data, leading to more accurate results and conclusions.

Other options do not align with the primary purpose of Survey Authentication. Collecting demographic information pertains to gathering background data from respondents but does not relate to identity verification. Ensuring survey questions are clear focuses on the quality and clarity of the survey's content rather than participant verification. Improving the user interface is about enhancing user experience and accessibility, which is separate from the security measures associated with respondent identity.