[4] UCD applies cognitive science principles to create intuitive, efficient products by understanding users' mental processes, behaviors, and needs.
The users are at the focus, followed by the product's context, objectives and operating environment, and then the granular details of task development, organization, and flow.
[2][3] The term user-centered design (UCD) was coined by Rob Kling in 1977[5] and later adopted in Donald A. Norman's research laboratory at the University of California, San Diego.
The main highlights of these are: In a later book, Emotional Design,[7]: p.5 onwards Norman returns to some of his earlier ideas to elaborate what he had come to find as overly reductive.
In most cases, personas are synthesized from a series of ethnographic interviews with real people, then captured in one- or two-page descriptions that include behavior patterns, goals, skills, attitudes, and environment, and possibly fictional personal details to give it more character.