Accessibility

Understanding Disability

  • Definition of Disability:

    • Described as an umbrella term that encompasses multiple types of impairments and limitations.

    • Disabilities can be categorized as:

    • Permanent: Long-lasting impairments.

    • Temporary: Short-term impairments (e.g., injuries like broken bones).

    • Situational: Contextual limitations faced by individuals.

  • Statistics on Disability in Canada:

    • According to Statistics Canada (2022), approximately 27% of Canadians are reported as being affected by some form of disability.

  • Key Considerations:

    • It is crucial to include participants with various disabilities in research and design processes due to the likelihood of having disabled users for products.

Curb Cut Effect

  • Definition:

    • Refers to the phenomenon where features designed explicitly for disabled individuals unexpectedly benefit a larger population.

  • Importance of Universal Design:

    • The curb cut effect is a form of universal design, which aims to make products accessible to individuals of all ages and abilities.

    • Removing barriers as much as possible is a core principle of universal design.

  • Examples of Curb Cut Effect:

    • Captions in media, audiobooks, and text-to-speech functionalities.

    • The benefits of accessible design extend beyond immediate users to the general public, enhancing overall usability.

  • Technological Implications:

    • Accessibility guidelines (e.g., WCAG) should be followed to ensure technology is operable, navigable, adaptable, distinguishable, and understandable for all users.

    • Example: Large text with appropriate contrast to aid user interaction.

    • Providing controls for audio/video interaction (e.g., speed adjustment and section rewinding).

Web Content Accessibility Guidelines (WCAG)

  • Definition:

    • WCAG stands for Web Content Accessibility Guidelines.

  • Core Principles - POUR:

    • Perceivable: Information must be presented in ways that are accessible to individuals with diverse sensory capabilities.

      • Example: Avoid relying solely on color to indicate information (e.g., mark required fields).

    • Operable: All interface elements must be navigable and usable through various means such as keyboard, mouse, and voice controls.

    • Understandable: Website languages and functionalities should be clear and straightforward for all users.

    • Robust: Interfaces must perform well with changing technology and be compatible with assistive technologies like screen readers.

  • Compliance Levels:

    • Different compliance levels are defined from A to AAA.

    • Generally, striving for AA is preferred as it balances accessibility with practicality.

    • A is the minimum compliance level, ensuring basic accessibility requirements are met such as compatibility with assistive tech, keyboard navigability, clearly labeled forms, and clarity in information representation.

Proxy Users in Research

  • Definition:

    • Proxy users are individuals without disabilities who are used stand-in for disabled users during research and testing.

  • Challenges of Proxy Users:

    • Using proxy users may seem feasible, especially if recruiting those with disabilities proves difficult; however, this approach has significant limitations.

    • It is impossible to replicate the lived experience and cultural insights of disabled users, which are critical for meaningful research.

    • Example: Tasks designed for color vision deficiency (CVD) cannot capture the true experience of actual users.

  • When Proxy Users Are Acceptable:

    • Proxy users may be appropriate in contexts such as family or care team members of disabled individuals, as they may have valuable insights into the user’s experiences and challenges.

    • Nonetheless, insights from actual disabled users should be prioritized and supplemented with proxy user information when necessary.

Working with Disabled Participants

  • Inclusion Criteria Considerations:

    • When recruiting participants, it is vital to define specific inclusion criteria reflecting the broad spectrum of disabilities.

    • Disabilities can vary in severity, duration, and effects on abilities, necessitating tailored approaches for each participant.

  • Understanding Different Levels of Ability:

    • Participants may use different assistive technologies, and understanding this use is crucial (e.g., what tech they use, duration of use, and tasks for which they employ these tools).

    • The design of the study may require adjustments based on the severity of disabilities; time budgeting might also need to be adapted.

  • Sources for Participant Recruitment:

    • Advocacy groups or social media forums can serve as valuable resources for finding participants with specific disabilities.

  • Accessibility of Experimental Design:

    • Researchers must consider factors such as:

    • The physical space for in-person experiments should be accessible.

    • If working with deaf individuals, it must be clear which sign language interpreters will be needed for communication.

  • Intervention in Research Obstacles:

    • Researchers must be prepared to address and overcome barriers that may arise during experiments to ensure continuity and should document any significant issues encountered.

Summary

  • Disability is a broad term encompassing various impairments and activity limitations.

  • Universal design is essential for making products usable and accessible to everyone.

  • Experimental designs should be carefully crafted to accommodate and include users with disabilities, ensuring a respectful and effective research process.

  • Reminder for upcoming exam: Scheduled next Friday, students advised to bring identification and writing materials.