What is the main function of Captcha Verification in surveys?

The main function of Captcha Verification in surveys is to ensure that respondents are not automated bots. Captchas are designed to differentiate between human users and automated programs by presenting challenges that are easy for people but difficult for bots to solve. This is important in survey research because automated responses can skew data, reduce the quality of insights generated, and increase the likelihood of spam submissions. By implementing Captcha, researchers can protect the integrity of their data by confirming that the responses are coming from real individuals, thereby enhancing the overall validity of the survey results.

Regarding the other options, they do not capture the primary purpose of Capthca. Navigational aids focus on user experience rather than verification, while additional demographic information is typically collected through specific survey questions rather than being a function of Captcha. Increasing response rates is a goal of survey designers, but Captcha does not inherently contribute to this; in fact, it may deter some respondents who find the verification process cumbersome.