Todo tipo de información sobre accesibilidad en la Web: errores de accesibilidad, ejemplos de páginas inaccesibles, noticias, software, hardware, productos de apoyo, consejos, pautas y guías de accesibilidad, WAI, WCAG, Norma EN 301 549, legislación, etc.
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lunes, 5 de abril de 2021
viernes, 2 de abril de 2021
¿Qué tal buenos son los textos alternativos generados de forma automática?
En el artículo Are bad graphical descriptions better than no graphical descriptions to someone with vision loss? se analiza la problemática actual de los textos alternativos que se generan de forma automática:
More than 125K global websites use overlays rather than fixing their accessibility bugs. AI-generated alt-text used by overlays is not 100 % reliable.
miércoles, 31 de marzo de 2021
Publicados los resultados de la tercera edición del estudio Web Accessibility Practitioners
WebAIM ha publicado los resultados de la tercera edición de su encuesta dirigida a los profesionales de la accesibilidad web: Survey of Web Accessibility Practitioners #3 Results.
Los resultados contienen información demográfica muy interesante sobre los profesionales de la accesibilidad web. Respecto a la accesibilidad web en sí misma, los principales resultados son:
- Mac OS is now the most common operating system. Chrome dominates with 63% of respondents reporting it as their primary browser.
- Respondents are generally pessimistic about web accessibility progress over time with 87% indicating that accessibility has gotten worse or not improved over the last year.
- 21% of respondents from corporations/industry reported receiving a lawsuit, threat of lawsuit, or OCR complaint compared to 39% of respondents (nearly double) from educational institutions.
- NVDA (37%) and VoiceOver (35%) are the most commonly used screen readers for testing, compared to only 16% for JAWS (down from 37% in 2014).
- Axe, browser developer tools, and WAVE are reported as the most commonly used testing tools.
- 76% of respondents indicate that ARIA has made the web more accessible, though that sentiment is much lower among respondents with disabilities and with more accessibility experience.
- A strong majority (67%) of respondents rate web accessibility overlays, plugins, or widgets as not at all or not very effective. Respondents with disabilities were even less favorable with 72% rating them not at all or not very effective, and only 2.4% rating them as very effective.
lunes, 29 de marzo de 2021
Cómo escribir un buen texto alternativo
Muy interesante todo el análisis que se realiza en el vídeo Writing Good Alt Text - HTTP 203:
viernes, 26 de marzo de 2021
miércoles, 24 de marzo de 2021
martes, 23 de marzo de 2021
Principales problemas de accesibilidad web y soluciones
Mañana miércoles 24 de marzo, participo con la conferencia "Principales problemas de accesibilidad web y soluciones" en la II Conferencia Internacional en Sistemas de Información y Tecnologías de Software (ICI2ST 2021).
El evento se podrá seguir en directo a través de Facebook Live.
lunes, 22 de marzo de 2021
El reto de probar la accesibilidad con lectores de pantalla
Muy interesante el análisis que se presenta en A developer's perspective: the problem with screen reader testing:
Screen readers are an essential part of using the web for people who are vision impaired, illiterate or have a learning disability.
Today’s screen readers traverse web pages and applications and read out user interface elements, content and allow users to navigate and interact with the web.
There are many screen readers available for different devices and platforms, each with differing levels of functionality, interfaces and features. The most common are JAWS, NVDA, VoiceOver and TalkBack.
[...]
As a developer regularly faced with time constraints, I have often wondered: what should be the baseline in terms of testing for screen readers, and what browser and screen reader combinations are the most important to cover in order to achieve the greatest level of WCAG compliance?
viernes, 19 de marzo de 2021
Personas que necesitan bajo contraste en vez de alto contraste
Hace unos meses escribí la entrada No todo es alto contraste, también hay gente que necesita bajo contraste en la que comentaba que los criterios de éxito de WCAG que piden que se garantice un alto contraste no son adecuados para personas que justo necesitan lo contrario, bajo contraste.
En la página Prefers-contrast: forced is a mistake también hablan de este tema:
Why would someone prefer low contrast? You, the reader, probably dim your screen at night, or use a blue light filter. Those both lower contrast. There are also people that dim the brightness of their screen to prevent triggering migraines as well as the photophobia and blue light sensitivity I mentioned earlier.
miércoles, 17 de marzo de 2021
Accesibilidad en Vue 3.0
Un vídeo en inglés sobre la accesibilidad de Vue 3.0, Vue 3.0 / Accessibility / Front-End EcoSystem - Virtual Developers Conference 2020:
lunes, 15 de marzo de 2021
Herramienta para analizar la accesibilidad de un sitio web
Domain Accessibility Audit es una herramienta de código libre, basada en axe, que permite analizar la accesibilidad de todo un sitio web a partir de un URL.
viernes, 12 de marzo de 2021
Cómo denunciar la falta de accesibilidad en un sitio web
A raíz de la sanción que ha recibido Vueling por la falta de accesibilidad de su sitio web (Derechos Sociales multa a Vueling con 90.000 euros por mantener una web poco accesible a personas con discapacidad), en Twitter Iván Novegil publicó una explicación de cómo denunciar la falta de accesibilidad web en un hilo:
miércoles, 10 de marzo de 2021
Evaluación de la accesibilidad web con las herramientas de desarrollador del navegador
En Seven ways to test for accessibility of your web site with browser Developer Tools se explica:
There are lots of ways to test your web site for accessibility issues. Services, software packages, even human testing companies. They all have their place and often a test with real people is the best thing to do. However, for a quick, preliminary test you don’t need to install anything or pay for a service. Browsers come with developer tools built-in and these have great accessibility testing features. Here’s a list of the ones in the Developer Tools of browsers like Microsoft Edge and Google Chrome.
lunes, 8 de marzo de 2021
Llamada de artículos para "How Mature Is Technology in Helping People with Disabilities?"
La revista International Journal of Environmental Research and Public Health ha publicado la llamada de artículos del número especial How Mature Is Technology in Helping People with Disabilities? en el cual participo como editor invitado. Los temas de este número especial son:
- Machine learning
- Human activity recognition
- Ambient assisted living
- Sensor fusion
- Big data
- Internet of Things
- Non-invasive sensors for sheltered homes
- Generation of datasets with sensors related to different disabilities
- Mobile applications for people with disabilities
- Serious games for people with disabilities
La fecha límite para el envío de artículos es el 31 de diciembre de 2021.
viernes, 5 de marzo de 2021
miércoles, 3 de marzo de 2021
lunes, 1 de marzo de 2021
Diferencias entre alt y figcaption
Una buena explicación en Alt vs Figcaption:
When we boil it all down, websites are really just a series of words and pictures. It’s a way for a person (or sometimes a robot, or sometimes a robot in a person trenchcoat) to tell you about a thing and you, a visitor to their internet page, to consume that thing in whatever form.
Sometimes that form is purely visual. An image.
For that we have the img element. Its sole requirement is the src attribute to direct your browser where to locate your image. And voilà! Visual splendor.
Images, however, have one more thing to consider: Assistive technologies need words to interpret an image. People sometimes need words to better understand why an image is being displayed.
Luckily we have a few ways to describe them in a human readable manner: alt and figcaption. These items house very different writing patterns though, and can be used both together and apart, depending on the conditions.
viernes, 26 de febrero de 2021
miércoles, 24 de febrero de 2021
lunes, 22 de febrero de 2021
Las 11 reglas de oro de la accesibilidad
- Always use a meaningful Alt text
- Define the level of accessibility of your website and follow the guidelines
- Optimise Color Contrast
- Simplify the language
- Lead the users
- Always provide captions for video content
- Don't forget to test keyboard navigation
- Create large buttons!
- Create understandable links
- Use semantic HTML elements
- Use ARIA landmark roles to add feature context to HTML elements