Lecture 9 Flashcards
What are the five components of Nielsen’s definition of usability?
Learnability
Efficiency
Memorability
Errors
Satisfaction
Define learnability
How easy it is for a user to learn to use the website and accomplish basic tasks the first time they encounter the design
Define Efficiency
How quickly can tasks be accomplished once the user knows what to do
Define memorability
When returning to the design after a period of absence, how quickly can a user remember what to do?
Define errors
How many errors do users make when attempting a task and how easily can they recover from them?
Define Satisfaction
How pleasant is it to use the design
What are the six components of Jordan’s definition of usability?
Guessability
Learnability
Memorability
Experienced User Performance
Potential
Reusability
Define guessability
How easy is it for a new user to work out what to do
Define Experienced User Performance
How well does an experienced user perform, compared to beginners
Define potential
What is the best performance one can expect of an experienced user
Define reusability
How much does performance degrade if a user returns to the product after a period of time
Define utility (Nielsen)
Whether the design provides the features you need
Define Usefulness (Nielsen)
Whether a design is both usable and has the required utility
Why is usability important
- If a website is difficult to use, people leave
- If homepage doesn’t clearly state what the company does people leave
- If users get lost they leave
- If the information is hard to read they leave
Usability stops people from leaving!
What is one of the most useful ways to measure usability?
User testing
