ISTQB CT-DAT

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Digital accessibility testing evaluates whether people with disabilities can perceive, understand, navigate, interact with, and use digital products and services. It combines evaluation against accessibility requirements with testing that identifies barriers in real-world use.

The ISTQB® Certified Tester Digital Accessibility Testing (CT-DAT) certification complements the Foundation Level as a specialist module. It covers accessibility concepts, standards, test planning, execution, and reporting, together with the practical use of assistive technologies and accessibility testing tools.

Chapter 1: Basic Concepts of Digital Accessibility

• Fundamentals of Digital Accessibility
  • Explain digital accessibility and its relationship with usability and user experience
  • Understand the objectives of a digital accessibility evaluation
  • Summarize key principles and practices for digital accessibility testing
• Disabilities
  • Explain visual, hearing, mobility/physical, cognitive and learning, and speech disabilities
  • Understand the importance of accessible software and the medical and social models of disability
• Risks of Inadequate Digital Accessibility
  • Summarize organizational, technical, maintenance, and supplier risks
  • Understand the potential legal, user experience, reputational, and financial consequences of inaccessible software

Chapter 2: Digital Accessibility Standards

• Digital Accessibility Guidelines
  • Explain the general content and applicability of accessibility guidelines to different projects and applications
• Digital Accessibility Regulations and Standards
  • Understand the relationship between accessibility standards, legislation, and project requirements
  • Explain the general content and applicability of ISO 9241-171 for software accessibility
  • Explain the structure of the Web Content Accessibility Guidelines (WCAG), including principles, guidelines, success criteria, and conformance levels
  • Understand typical accessibility criteria and guidance for applying WCAG to non-web technologies

Chapter 3: Digital Accessibility Testing Activities

• The Approach to Digital Accessibility Testing
  • Explain planning activities, including prioritizing functionality, selecting tools, defining acceptance criteria, and building team knowledge
• Digital Accessibility Testing Activities
  • Explain the benefits of integrating accessibility testing early in the software development lifecycle
  • Understand how automated, manual, and assistive technology testing provide complementary evidence
  • Summarize the process of accessibility audits for evaluating conformance
  • Explain the value of end-user testing in evaluating real-world accessibility
• A Step-by-Step Approach to End-User Testing
  • Understand participant recruitment, representative tasks, session facilitation, analysis, and reporting
  • Recognize the importance of fair compensation, informed consent, and participant privacy
• Risks and Defects in Digital Accessibility Testing
  • Explain typical project risks and appropriate mitigation measures
  • Recognize common accessibility defects involving semantic information, focus management, dynamic content, alternative text, and visual presentation

Chapter 4: Digital Accessibility Testing Lifecycle

• Preparing a Digital Accessibility Test
  • Explain factors in test planning, including requirements, scope, objectives, approach, resources, responsibilities, and scheduling
  • Understand configuration requirements for operating systems, browsers, assistive technologies, devices, and test data
• Executing Digital Accessibility Tests
  • Explain applicable build-time checks, UI-based automated scanning, and manual testing tasks
  • Understand testing of keyboard navigation, screen reader interaction, contrast, zoom and reflow, multimedia, and safety-related visual content
• Analyzing and Communicating Findings
  • Analyze test results to identify patterns, likely root causes, user impact, and priorities for action
  • Explain the information needed to make accessibility findings clear, reproducible, and actionable
  • Apply good practices for reporting results and communicating with different stakeholders
  • Summarize the purpose and structure of formal accessibility reports, including Accessibility Conformance Reports (ACRs) and the use of VPAT® templates

Chapter 5: Assistive Technology

• Understanding Assistive Technologies
  • Explain screen readers, screen magnifiers, voice control, and alternative input devices
  • Understand how accessibility APIs and the accessibility tree expose information to assistive technologies
• Using Assistive Technologies
  • Apply screen reader techniques to evaluate navigation, control identification, states, and dynamic updates
  • Use screen magnification to evaluate focus tracking, visibility, and access to content
  • Use voice control to evaluate activation through spoken commands
  • Verify interaction behavior for the supported platform, device, and assistive technology configuration

Chapter 6: Tools for Digital Accessibility Testing

• Test Automation and Artificial Intelligence
  • Summarize the benefits and limitations of automated accessibility testing
  • Understand coverage limitations, false-positive results, and the risks of interpreting automated scores as proof of accessibility
  • Explain how AI can support accessibility testing and remediation, including the need to verify generated findings and fixes
  • Recognize AI-related risks involving uncertainty, incorrect output, data privacy, and the absence of lived experience of disability
• Categories of Digital Accessibility Tools
  • Classify tools according to their primary capabilities and testing purpose
  • Explain Category 1: Static analysis and CI/CD pipeline tools for early source-level checks
  • Explain Category 2: Automated UI-based scanners and manual helpers for evaluating rendered interfaces
  • Explain Category 3: Assistive technologies for evaluating product behavior through representative configurations
  • Explain Category 4: Cognitive and readability tools for supporting content clarity, comprehension, and predictability