Ensuring Accessibility : How to test for SC 1.3.3 Sensory Characteristics

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Overview

Success Criterion 1.3.3, a key part of web accessibility standards, mandates that instructions for interacting with content should not depend exclusively on sensory attributes like shape, color, size, visual position, orientation, or sound. This criterion is essential for creating web experiences that are accessible to a diverse audience, including those with disabilities. To meet SC 1.3.3, ensure that instructions are comprehensible through multiple sensory modes, so that no single sensory trait is the only method of conveying information.


Benefits to Which User

Following SC 1.3.3 is helpful for several types of users:

  1. People with Visual Impairments: If someone has difficulty seeing, they might not be able to use instructions based only on visual details like color or shape. For instance, if a button is described only by its color, someone who can’t see colors won’t be able to follow the instructions. Adding text descriptions ensures that everyone can understand and use the content.

  2. People with Hearing Impairments: If someone has difficulty hearing, they might miss out on instructions that rely solely on sound. For example, if a sound is used to indicate an action, those who can’t hear the sound will not know what to do. By providing written or visual alternatives, you make sure that the instructions are clear for everyone.


How to Test

To check if your content meets SC 1.3.3, follow these steps:

  • Testing for Visual Cues:
    • Look at the content and find any instructions related to using or understanding the content.
    • See if these instructions rely only on visual elements like color, shape, size, or position.
    • Make sure that these visual cues are also accompanied by non-visual information, such as text that can be read by screen readers.

  • Testing for Sound Cues:

    • Ensure that any sound-based instructions are also accompanied by text or visual information so that users who can’t hear can still understand what to do.
    • Check the content for instructions that depend on sound.

Example, Explanation, and Solution

Example: Imagine a website form where users are told to “click on the red button in the top right corner” to continue. There is also a sound that plays when the button is clicked.

Explanation: This might be confusing for people who have trouble seeing colors or distinguishing where things are on the screen, and for those who can’t hear the sound. They might not know which button to click or might miss the sound cue.

Solution: To make the instructions clearer for everyone:

  • Update the instruction to: “Click on the button labeled 'Submit' to proceed. It is located at the top right of the screen and is clearly marked with text.”
  • Ensure the button has a text label that can be read by screen readers.
  • Include additional visual or text-based information about what the button does and where it is located.

By doing this, you make sure that all users, regardless of their sensory abilities, can follow the instructions and use your content effectively.


Summary:

SC 1.3.3 is about making sure instructions are accessible through various means, not just one sensory characteristic. By providing multiple ways to understand the instructions, you help create a more inclusive and user-friendly experience for everyone. Regularly checking and updating your content according to this guideline ensures that all users can easily access and interact with your site.


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