Prioritizing Accessibility: Why Human Accessibility Testing Trumps Automated Tools

by | Feb 8, 2024 | Blog

Human accessibility testing and code-level fixes are paramount for creating genuinely accessible websites.

In the digital age, where websites serve as gateways to information, services, and opportunities, ensuring accessibility for all users is a moral and legal requirement in many jurisdictions. However, achieving accessibility goes beyond relying solely on automated evaluation tools to detect issues and then merely applying quick fixes with plugins and widgets.

While accessibility plugins and widgets can be helpful, they often serve as bandages rather than addressing the root cause of accessibility issues. In this article, we’ll delve into why human accessibility testing and code-level fixes are paramount for creating genuinely accessible websites.

The Limitations of Automated Tools

Automated accessibility testing tools undoubtedly have their place in the web development toolkit. They offer a quick way to identify common accessibility issues, such as missing alt attributes, inconsistent heading structures, or insufficient color contrast. However, these tools come with inherent limitations:

1. Surface-Level Detection:

Automated tools excel at identifying low-hanging accessibility fruits, but they often miss nuanced issues that require human judgment to detect. For instance, they might overlook complex interaction patterns or semantic HTML misuse.

2. False Positives and Negatives:

Automated tools can generate false positives, flagging elements as inaccessible when they are not, leading to unnecessary remediation efforts. Conversely, they might overlook genuine accessibility barriers, providing a false sense of compliance.

3. Inability to Assess User Experience:

While automated tools can analyze code, they cannot replicate the diverse user experiences of individuals with disabilities. They lack the contextual understanding necessary to evaluate the usability and accessibility of interactive elements comprehensively.

The Importance of Human Testing

Human testing, involving individuals with diverse disabilities interacting with the website, is indispensable for uncovering accessibility barriers that automated tools miss. Here’s why human testing should take precedence:

1. Contextual Understanding:

Human testers bring a nuanced understanding of accessibility challenges based on their lived experiences. They can pinpoint issues that automated tools may overlook, providing invaluable insights into the real-world usability of the website.

2. User-Centric Approach: 

Human testing prioritizes the needs and experiences of individuals with disabilities, ensuring that accessibility improvements are tailored to enhance user experience rather than merely achieving compliance.

3. Comprehensive Evaluation:

Unlike automated tools, human testers can assess the technical compliance and the website’s overall usability and inclusivity. They can identify navigation difficulties, content comprehension barriers, and interaction challenges that impact user engagement.

Code-Level Fixes for Lasting Accessibility

While accessibility plugins and widgets may identify accessibility violations, true accessibility requires code-level fixes that address the root cause of the issues. These types of changes may involve:

1. Semantic HTML:

Ensuring proper semantic markup lays the foundation for accessibility. Using semantic elements like <nav>, <main>, and <article> enhances screen reader navigation and improves document structure.

2. Keyboard Navigation:

Implementing keyboard accessibility features enables users to navigate the website without a mouse, catering to individuals with motor disabilities. True keyboard accessibility is achieved by ensuring all interactive elements are reachable and operable via keyboard inputs.

3. ARIA Roles and Attributes:

Leveraging ARIA (Accessible Rich Internet Applications) roles and attributes enhances the accessibility of dynamic and interactive content. Carefully applying ARIA roles can clarify the purpose and behavior of elements for assistive technologies.


While automated accessibility testing tools have their utility, they are no substitute for human testing and code-level fixes. Prioritizing human-centered testing approaches and addressing accessibility issues at the code level ensures that every user can access and interact with websites seamlessly, regardless of their abilities. By embracing a holistic approach to accessibility, we comply with regulations, foster inclusivity, and enhance user experience for all.