M any users - whatever their abilities - will face challenges due to demanding contexts. Legible, high-contrast text that helps people with vision difficulties also helps people with perfect eyesight who are using the app outdoors in bright sunlight. For instance, video captions that help people with hearing difficulties also help a person who is watching the video on mute (e.g., in a social media feed). That’s because accessibility features that help people with disabilities often help other people, too. Unlike usability, accessibility focuses on people with disabilities.Īccessibility is not only the right thing to do, but often also brings benefits to all users. Accessibility, on the other hand, is concerned with whether all users are able to access an equivalent user experience, however they encounter a product or service (e.g., using assistive devices). Theoretically, this means that usability includes accessibility, since a product that is inaccessible is also unusable to someone with a disability practically, however, usability tends not to specifically focus on the user experience of people with disabilities. ![]() ![]() Usability is concerned with whether designs are effective, efficient and satisfying to use. Both overlap and are vital parts of user experience (UX) design, but there are also key distinctions between them. We have a long way to go and as we work more in this areas we’d love to hear your suggestions and feedback.Since they have similarities, accessibility is sometimes confused with usability. There’s lots more to consider, from text sizing and color contrast to keyboard navigability and giving access to the underlying data for non-visual exploration, as shown in the example above via a simple link in the footer. Screen-reader text is only one part of the accessibility picture. What type of chart is it? What aspects or values are the most important and stand out? Try and get in all the key details while keeping the message as short as possible. Instead, use the screen reader text to provide an alternative to the visual aspect of the graphic specifically. As your titles and subtitles in Flourish visualizations will always be read out by screen readers, it doesn’t make sense to repeat these in the screen-reader description. Whether you’re designing for sighted or non-sighted users, the main title and subtitle should usually be descriptive, summarizing the main point of the graphic rather than just describing what data is being visualized. How to write a good screen-reader description Under the hood, the text is added to the page as a hidden paragraph which becomes visible to screen readers via an aria-describedBy attribute on the main visual container, the contents of which gets an aria-hidden attribute.Īs part of this update, we’ve also added a title attribute to the iframes that visualizations are embedded in, to differentiate their content as “visual or interactive content”. In this mode you can write a text description that will be read out in place of the visual element when the user taps on it or when a screen reader is reading out the entire page. Hence for most visualizations, you’ll want to stick with the default setting: hidden. This is somewhere between unhelpful and deeply annoying for screen-reader users. That might be what you want for a text-based visual such as a Cards grid.įor a chart, however, the text in the main visual container is usually an unhelpful scattering of unordered data-point labels, axis labels and annotations. If you set your main visualization container to be readable, screen readers will attempt to read the content inside it. ![]() This is configured in a new “Accessibility” settings block you’ll find in all our core templates. But now you can optionally provide screen readers with an text alternative for the “main” visual part of the graphic. Titles, subtitles and footers in your visualizations were always readable by screen readers, and that’s still true.
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