A paper by Jakob Nielsen about the purpose and methods for using focus groups to understand users and guide the development of interactive systems.| Nielsen Norman Group
Easy test user recruiting is crucial to an effective usability process. The average per-user cost is $171, but varies greatly depending on location and the targeted profession.| Nielsen Norman Group
Despite many weaknesses, interviews are a valuable method for exploratory user research.| Nielsen Norman Group
What users believe they know about a user interface impacts how they use it. Mismatched mental models are common, especially with designs that try something new.| Nielsen Norman Group