Ensuring that the Web Page contains another CAPTCHA serving the same purpose using a different modality

Important Information about Techniques

See Understanding Techniques for WCAG Success Criteria for important information about the usage of these informative techniques and how they relate to the normative WCAG 2.1 success criteria. The Applicability section explains the scope of the technique, and the presence of techniques for a specific technology does not imply that the technology can be used in all situations to create content that meets WCAG 2.1.

Applicability

Applies to all technologies.

This technique relates to Success Criterion 1.1.1: Non-text Content (Sufficient, together with G143: Providing a text alternative that describes the purpose of the CAPTCHA).

Description

The purpose of this technique is to reduce occasions in which a user with a disability cannot complete a CAPTCHA task. Because there are alternate CAPTCHA tasks that use different modalities, a user is more likely to be able to complete one of the tasks successfully.

Examples

Tests

Procedure

For each CAPTCHA in a Web page

  1. Check that the Web page contains another CAPTCHA for the same purpose but using a different modality.

Expected Results

  • Check #1 is true.