AI systems often experience significant challenges and difficulties in their performance, leading to instances of poor output.
In a recent discussion, Susanne Baumer from Digital ohne Hürden highlighted the limitations of automated accessibility testing tools, stating that they often fail to detect around 70% of accessibility problems. This revelation underscores the need for a more comprehensive approach to ensuring digital accessibility.
Baumer pointed out several key issues that these tools often overlook, including barriers related to keyboard operability. For instance, interactive elements on websites, such as size selectors, may not be navigable using a keyboard, making it difficult for blind or motor-impaired users to complete tasks like online shopping.
Moreover, accessibility barriers impact a broader range of users than just those with formal disabilities. Older users or those temporarily injured may also encounter challenges due to poor digital accessibility.
Critical accessibility issues often require human judgment and contextual understanding, which automated tools cannot replicate. The standards, such as the WCAG (Web Content Accessibility Guidelines) and the European EN 301 549 norm, have been in place for over 25 years. However, relying solely on automated tests can lead to overlooking most real-world barriers.
The standards emphasise principles of content being perceivable, operable, understandable, and robust. However, many subtle and practical barriers go undetected by machines. Developers are advised to self-test keyboard operability by putting aside the mouse and testing all functions with Tab, Enter, and cursor keys.
It is important to note that overlay tools, while addressing certain aspects, do not meet legal requirements for accessibility. The joint assessment of federal and state monitoring authorities confirms this. Developers are encouraged to consider this when ensuring their digital platforms are accessible to all users.
In conclusion, while automated testing tools can be useful, they should not be relied upon solely for accessibility testing. A well-thought-out concept that considers the needs of all users is required for real accessibility. Developers who are familiar with relevant technical standards are essential in this regard. The legal requirement for e-commerce providers, financial service providers, and others to make their websites barrier-free by June 28, 2025, still stands.
The technology used in automated accessibility testing tools might miss around 70% of accessibility problems, according to Susanne Baumer. For instance, interactive elements like size selectors on websites can be inaccessible for blind or motor-impaired users due to poor keyboard operability.
