What is usability?
Usability is the capacity of a system to allow users to perform tasks safely, effectively, and efficiently while enjoying the experience.
What are the three key aspects of usability according to the ISO definition?
Effectiveness, efficiency, and satisfaction in a specified context of use.
What is the difference between 'user friendly' and 'usable'?
'User friendly' is often used as a synonym for usable, but it may also refer to accessibility. Usable is the more appropriate term for describing how well a product can be used.
What is learnability in usability?
Learnability is how easy it is for users to accomplish basic tasks the first time they encounter a design.
What is efficiency in usability?
Efficiency is how quickly users can perform tasks once they have learned the design.
What is memorability in usability?
Memorability is how easily users can re-establish proficiency when they return to a design after a period of not using it.
What are errors in usability?
Errors refer to how many errors users make, how severe they are, and how easily they can recover from them.
What is satisfaction in usability?
Satisfaction is how pleasant it is to use the design.
Why is usability important for websites?
Users have a low tolerance for difficult designs or slow sites. They don't want to wait or learn how to use a homepage; they need to grasp its functioning within seconds or they will leave.
What is prototypicality in usability?
Prototypicality is how much a product conforms to the expected shared norm. For example, users prefer websites that follow recognised design norms.
What is user-centered design?
User-centered design is a design paradigm where the product is designed with its intended users in mind at all times.
What is participatory design?
Participatory design is a design paradigm where some users become actual or de facto members of the design team.
What is contextual inquiry?
Contextual inquiry is a usability research method that observes and interviews users in their natural environment to identify needed functionality or design flaws.
What is the difference between ergonomics and usability?
Ergonomics focuses on physiological matters (e.g., turning a door handle), while usability focuses on psychological matters (e.g., recognizing that a door can be opened by turning its handle). Some view usability as a software specialization of ergonomics.
What is web usability?
Web usability is the study of the elegance and clarity with which the interaction with a website is designed, focusing on how easily users can achieve their goals on the site.
What are the key principles of good user interface design?
Key principles include layout, consistency, contrast, readable text, clear navigation, and accessibility.
Why is consistency important in interface design?
Consistency helps users learn and predict how the interface works, reducing errors and improving efficiency.
Why is contrast important in interface design?
Contrast improves readability and helps users distinguish between different elements, making the interface easier to use.
Why is clear navigation important in a user interface?
Clear navigation helps users find what they need quickly and easily, reducing frustration and improving overall usability.
What does accessibility mean in interface design?
Accessibility means designing interfaces that can be used by people with a wide range of abilities, including those with disabilities.
Why should designers consider different devices when designing an interface?
Interfaces must work well on various devices (e.g., phones, tablets, desktops) with different screen sizes and input methods, so designers need to ensure usability across them.
How can usability be evaluated?
Usability can be evaluated through methods such as needs analysis, user observation, interviews, and testing with representative users.
What is the goal of iterative design in usability?
Iterative design aims to improve user experience by repeatedly testing and refining the design based on user feedback.