The interaction cost is the sum of efforts — mental and physical — that users must deploy in interacting with a site in order to reach their goals.| Nielsen Norman Group
Participants log daily activities as they occur to give contextual insights about real-time user behaviors and needs.| 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
Across many tasks, learning curves show an initial learning period, followed by a plateau of optimal efficiency.| Nielsen Norman Group