Which survey element is used to confirm the authenticity of respondents?

Captcha Verification is the appropriate survey element for confirming the authenticity of respondents. Captchas work by presenting challenges that are easy for humans to solve but difficult for automated programs. This ensures that the responses collected are from real individuals rather than bots or automated scripts, thus enhancing the integrity of the survey data.

In the context of survey practices, ensuring the authenticity of respondents is crucial for obtaining reliable insights. If the data is compromised by automated or fraudulent entries, the validity of the survey results can be questioned.

Other options, while useful in certain contexts, do not specifically address the need for confirming authenticity in the same way. File Upload might be used for collecting documents or images but doesn't verify if the respondent is genuine. Timing Questions can help assess whether respondents are giving thoughtful answers, but they do not necessarily confirm the authenticity of the individual completing the survey. Finally, signatures can serve as a means of verification in some contexts but are less commonly used in digital surveys compared to captcha systems.