Ability-Based Design
Ability-based design focuses on what users can do rather than what they cannot, building systems that adapt to each user's abilities instead of requiring users to adapt to fixed interfaces.
Definition
Ability-based design is a design approach that centres on users' abilities, holding that systems, rather than users, should bear the responsibility of adapting, so that interfaces are tailored or adapt to what each user can perceive and do.
Scope
This topic covers the ability-based design approach and its realization: the shift in focus from disability to ability, the principle that systems should be responsible for fitting the user, and adaptive and automatically generated interfaces that tailor themselves to an individual's motor or perceptual abilities. It does not cover fixed accessibility standards, treated under web accessibility, nor the broad universal design philosophy, treated under universal and inclusive design.
Core questions
- How does focusing on abilities rather than disabilities change design?
- What are the core principles of ability-based design?
- How can interfaces be automatically adapted to an individual's abilities?
- How does ability-based design relate to accessibility and inclusive design?
Key concepts
- ability-based design
- focus on ability not disability
- system adaptation responsibility
- automatically generated interfaces
- personalized interfaces
- adaptive accessibility
- ability modeling
- accountability of the system
Key theories
- Ability-based design principles
- Ability-based design articulates principles, most centrally that the system, not the user, should adapt, and that designers should focus on ability, accountability, and adaptation, reframing accessibility around leveraging what users can do.
- Automatic interface adaptation
- Systems such as Supple can automatically generate interfaces optimized to an individual's motor and perceptual abilities, demonstrating that interfaces can be computationally tailored to each user rather than designed once for an average user.
- Adaptation over remediation
- Rather than retrofitting fixed designs, ability-based design treats adaptation as central, complementing standards-based accessibility with systems that flexibly fit diverse and changing abilities.
Clinical relevance
Ability-based design points toward interfaces that adjust to individual users, which can benefit people whose abilities differ from the norm or change over time, including from injury, fatigue, or ageing; automatically adapted interfaces have improved speed and accuracy for users with motor impairments.
History
Ability-based design was introduced by Wobbrock and colleagues in 2011 and elaborated in 2018, growing from accessibility research that sought alternatives to fixing fixed designs. Systems such as Supple, which automatically generated personalized interfaces, demonstrated the approach, positioning adaptation as a complement to standards-based accessibility.
Key figures
- Jacob O. Wobbrock
- Krzysztof Z. Gajos
- Shaun K. Kane
- Daniel S. Weld
- Gregg C. Vanderheiden
Related topics
Seminal works
- wobbrock2011
- gajos2010
- wobbrock2018
Frequently asked questions
- How is ability-based design different from accessibility?
- Traditional accessibility often adapts a fixed mainstream design to meet disabled users' needs or relies on assistive technology. Ability-based design instead starts from each user's abilities and makes the system responsible for adapting to them, aiming for interfaces that fit the individual rather than the average user.
- Can interfaces really adapt automatically to a person's abilities?
- Research systems such as Supple have shown that interfaces can be generated to match an individual's measured motor and perceptual abilities, improving performance for some users. Such automatic adaptation is still an active research area, but it demonstrates the feasibility of tailoring interfaces per user.