Our research shows that tutorials don’t make users faster or more successful at completing tasks; on the contrary, they make them perceive the tasks as more difficult.| Nielsen Norman Group
Field research is conducted in the user’s natural setting. Learn the unexpected by leaving the office and observing people in their normal environments.| Nielsen Norman Group
Human working memory holds information relevant to the current task; a physical or virtual external memory can help in tasks with a high working-memory burden.| Nielsen Norman Group
The total cognitive load, or amount of mental processing power needed to use your site, affects how easily users find content and complete tasks.| Nielsen Norman Group
Modal dialogs interrupt users and demand an action. They are appropriate when user’s attention needs to be directed toward important information.| Nielsen Norman Group
Jakob Nielsen's 10 general principles for interaction design. They are called "heuristics" because they are broad rules of thumb and not specific usability guidelines.| Nielsen Norman Group