When based on user research, personas support user-centered design throughout a project’s lifecycle by making characteristics of key user segments more salient.| Nielsen Norman Group
Qualitative surveys ask open-ended questions to find out more, sometimes in preparation for doing quantitative surveys. Test surveys to eliminate problems.| Nielsen Norman Group
Despite many weaknesses, interviews are a valuable method for exploratory user research.| 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
Participants log daily activities as they occur to give contextual insights about real-time user behaviors and needs.| 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