Kiosk design must prioritize essential functions for accessibility over subjective usability preferences.

Why It Matters

This distinction is crucial for ensuring that kiosks are not only functional but also truly inclusive. By separating and prioritizing essential accessibility needs, designers can create interfaces that are usable by a wider range of individuals, preventing exclusion and enhancing the overall user experience.

Key Finding

While both accessibility and usability involve aspects like consistency and user control, accessibility is fundamentally about ensuring essential functions are usable by everyone, whereas usability extends to subjective preferences and additional features.

Key Findings

• Accessibility and usability share commonalities in areas like consistency and user control.
• Accessibility concerns primarily revolve around essential functions, while usability often relates to psychological factors, additional features, and personal preferences.
• Users with disabilities encounter significant difficulties with kiosk operations and physical access.

Research Evidence

Aim: What are the distinct characteristics of accessibility and usability in the context of interactive kiosks, and how do they relate to the experiences of people with disabilities?

Method: Qualitative research

Procedure: A literature review was conducted to analyze the concepts of accessibility and usability. Subsequently, focus group interviews were held with individuals experiencing visual, hearing, and physical impairments to gather insights into their challenges with kiosk usage. The findings were then analyzed to delineate the characteristics of accessibility and usability and to illustrate their relationship.

Context: Interactive kiosk design in public spaces

Design Principle

Essential functions must be universally accessible before subjective usability enhancements are considered.

How to Apply

When designing any interactive interface, first map out the absolute essential tasks a user must complete. Ensure these tasks are navigable and operable by individuals with diverse abilities, then proceed to enhance the experience with secondary features.

Limitations

The study's findings are based on qualitative data from focus groups, which may not be generalizable to all user populations or kiosk types. The specific context of the kiosks used by participants was not detailed.

Student Guide (IB Design Technology)

Simple Explanation: When making something like a self-service machine, make sure everyone can do the basic things it's supposed to do first, before adding extra cool features that only some people might want.

Why This Matters: Understanding the difference between accessibility and usability helps you design products that are not just easy to use for most people, but truly usable and inclusive for everyone, especially those with disabilities.

Critical Thinking: How might a design that heavily prioritizes subjective usability over essential accessibility inadvertently exclude significant user groups?

IA-Ready Paragraph: This research highlights a critical distinction in design: essential functions for accessibility must be prioritized over subjective usability preferences. By focusing on core task completion for users with diverse needs, designers can ensure a baseline level of inclusivity before developing secondary features that cater to personal preferences, leading to more equitable and effective product design.

Project Tips

• When researching user needs, clearly differentiate between what is a fundamental requirement for use versus what is a desirable enhancement.
• Use focus groups to gather rich qualitative data on user experiences, particularly from underrepresented groups.

How to Use in IA

• Reference this study when discussing the importance of user research and the distinct considerations for accessibility and usability in your design process.

Examiner Tips

• Demonstrate an understanding of how to prioritize design requirements, particularly when addressing the needs of diverse user groups.

Independent Variable: Design characteristics of kiosks (e.g., interface layout, physical access, feature set)

Dependent Variable: User experience of kiosks (measured by perceived usability and accessibility, task completion success, user satisfaction)

Controlled Variables: Participant demographics and disability types, kiosk context

Strengths

• Addresses a critical gap in understanding the relationship between accessibility and usability for emerging technologies.
• Employs qualitative methods to capture nuanced user experiences.

Critical Questions

• To what extent can subjective usability features be designed to also enhance accessibility?
• How can design guidelines effectively mandate the prioritization of essential accessibility features?

Extended Essay Application

• Investigate the accessibility and usability of a specific public interactive system (e.g., transit ticket machines, hospital information kiosks) for a particular user group with disabilities, proposing design improvements based on the distinction between essential functions and subjective preferences.

Source

Comparative Analysis of Usability and Accessibility of Kiosks for People with Disabilities · Applied Sciences · 2023 · 10.3390/app13053058