Survey Platform - Captcha Verification | Qualtrics

Captcha Verification


Captcha Verification (or Completely Automated Public Turing Test to tell Computers and Humans Apart) is a common web technique used to help ensure that your respondents are real humans and not a program written to spam your survey. In a Captcha Verification, the respondent is presented with a picture (or “challenge”) of words or characters, and the respondent must correctly type out those characters in order to proceed.


Though most humans find this task easy, spam programs have a much more difficult—nearly impossible—time. This preventative measure can be important when you are offering monetary or other incentives to take your survey.

Qtip: We recommend placing your Captcha Verification question on its own page at the beginning of your survey so that respondent’s don’t have to redo the captcha if they fail validation on another question.

Captcha is a third-party service provided by Google. No respondent information is sent to Google as part of this service. Visit Google’s reCAPTCHA page to learn more.

Qtip: Captcha does not prevent respondents from taking the survey multiple times. Consider using features like Authenticators or Individual Links to prevent multiple survey attempts from the same individual.

Respondent Experience

Captcha Verification does not include any editable options in the survey editor, but respondents will be given certain options by default to assist in completing the verification.

New Challenge

If the respondent has difficulty reading the challenge words, they can press the “Get a new challenge” button.


Audio Challenge

If the respondent is visually impaired, or has difficulty with visual challenges in general, they can press the “Get an audio challenge” button instead.


Failed Challenge

If the respondent fails to type the correct information, they will see the following error message and be presented with a new challenge. There is no limit to the number of new challenges they may attempt.


Additional Help

If the respondent would like to learn more about the Captcha service, they can click the “Help” button.


Privacy & Terms

If the respondent would like to learn more about the Google’s privacy features and terms of service, they can click Privacy & Terms.