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Usability 101: Introduction to Usability
High usability is very important when it comes to websites or interfaces where users are trying to complete a task. But if we want to encourage people to play or want to be experimental, making something that violates all usability rules and is deliberately anti user friendly can actually increase engagement (see Principle 29).
Irene Pereyra • Universal Principles of UX: 100 Timeless Strategies to Create Positive Interactions between People and Technology (Rockport Universal)
Usability describes the ease with which the user of the product can understand how it works and how to get it to perform.
Don Norman • Emotional Design: Why We Love (or Hate) Everyday Things
You’ll find a lot of different definitions of usability, often breaking it down into attributes like Useful: Does it do something people need done? Learnable: Can people figure out how to use it? Memorable: Do they have to relearn it each time they use it? Effective: Does it get the job done? Efficient: Does it do it with a reasonable amount of tim
... See moreSteve Krug • Don't Make Me Think, Revisited: A Common Sense Approach to Web Usability (Voices That Matter)
Usability refers to how easy your experience is for your prospects to learn and use. The most common opportunities for improving usability relate to forms, website errors, and speed.
Chris Goward • You Should Test That: Conversion Optimization for More Leads, Sales and Profit or The Art and Science of Optimized Marketing
Typically, usability is measured relative to users' performance on a given set of test tasks. The most basic measures are based on the definition of usability as a quality metric:
- success rate (whether users can perform the task at all),
- the time a task requires,
- the error rate, and
- users' subjective satisfaction.