Development of a WCAG theme for a learning management system
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presentation of masterthesis, Graz University of Technology June 2022
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Development of a WCAG theme for a learning management system
- 1. Development of a WCAG theme for a learning management system © Bernhard Kargl, BSc
- 2. Overview • Usability Testing • Types of Disabilities • Assistive Technology • E-Learning • Web Content Accessibility Guidelines • Methodology • Implementation • Evaluation
- 3. Usability Testing - Definition • Process of collecting and combining data • With a set of statistics • Comparative and numerical assessments • Estimation of accordance to predefined goals
- 4. Usability Testing – Evaluation Types • Formative Evaluation • Focus on usability before the end of development process • Quantitative and qualitative targets • Summative Evaluation • Focus on analysing and estimating the development process • Used to compare different development processes
- 5. Usability Testing – Evaluation Methods • Rapid Prototyping • Prototyping Development • Paper and Pen Simulation • User-oriented benchmark tests • Thinking Aloud • Group Discussion • Constructive Interaction • Retrospective Testing
- 6. Usability Testing – Thinking Aloud • Studying cognitive processes • E.g. human computer interaction • Solving tasks loudly presenting thoughts • Outcome is quantitative or qualitative data • Comparison of different routes within the system
- 7. Usability Testing – Thinking Aloud • Advantages • Cheap • Robust • Flexible • Convincing • Intuitive • Disadvantages • Unnatural situation • Filtered statements • Blasing user behavior
- 8. Types of Disabilites - Definition • Described by • Individuals health condition • Environment • Different issues in different situations • Basic types • Visual impairments • Hearing Impairments • Motor Impairments • Cognitive Impairments
- 9. Types of Disabilites – Visual Impairment • Total Blindness • They are not able to see at all • Visually acuity worse than 3/60 (5%) • Low Vision • Beeing legaly blind • Seeing light and images probaly • Color Blindness • Difficulty to decide between two colors • No restrictions concerning black, white or grey
- 10. Assistive Technologies - Definition • General concept including assisstive products • Assistive products • Products that help people with disabilities • Concrete definition depends on disability type
- 11. Assistive Technology – Data of User Survey 8
- 12. Assistive Technology – Data of User Survey 8
- 13. Assistive Technology – Data of User Survey 8
- 14. E-Learning - Definition • Computer-based system • containing information to teach students • Information platforms • Content Management System (CMS) • Learning Management System (LMS)
- 15. E-Learning – Learning Management System (LMS) • Virtual environment • Simulating face to face learning • Based on communication technology • Web based systems with special features
- 16. E-Learning - Platforms • Angel • BBLearn • Canvas • D2L • Moodle • Sakaj
- 17. Web Content Accessibility Guidelines - Definition • Guidelines to create accessible content • Cover all types of disabilities • Three different layers • Principles • Guidelines • Success Criteria
- 18. Methodology ASK A QUESTION BACKGROUND RESEARCH CONSTRUCT A HYPOTHESIS TEST HYPOTHESIS BY DOING EXPERIMENT ANALYSE DATA AND DRAW CONCLUSION COMMUNICATE RESULTS
- 19. Implementation – Steps of Prototype development 1. Theme creation process 2. Integrate the existing appearance of TeachCenter 3. Overwrite the theme for accessibility concerns
- 20. Implementation – Overwrite for accessibility concerns • Adapt files • Columns2 • Activity navigation • Add further information • Aria-labels • Skipping Links • Create new files • Dashboard • Course • Control panel • Overwrite CSS • New and existing
- 21. Implementation – Overwrite theme for accessibility concerns (Dashboard)
- 22. Implementation – Overwrite theme for accessibility concerns (Course)
- 23. Evaluation • Thinking Aloud Test • 8 different questions • 4 probands • Different types of disabilities • Different screen readers and browsers User Blindness Low Vision Motor 1 0 1 1 2 1 0 0 3 1 0 0 4 0 1 0 User JAWS NVDA ZoomText 1 0 0 0 2 1 0 0 3 0 1 0 4 0 0 1
- 25. Thank you for your attention! And be aware of accessibility!