The Prentice Hall Essence of Computer Science Series provides a concise, practical and uniform introduction to the core components of an undergraduate Computer Science degree. Acknowledging recent changes within higher education, this approach uses a variety of pedagogical tools - case-studies, worked examples and self-test questions - to underpin the student's learning.The Essence of Human-Computer Interaction provides a concise, no-nonsense introduction to studying HCI. It covers all of the essential elements of a standard Human-Computer Interaction course, including Artificial Intelligence, Psychology and Cognitive Science, and suggests ways in which to further develop areas of interest in the subject. It provides examples from everyday life as well as computer systems, such as real interfacing problems and solutions. It also includes practical experiments for the reader to try, through an examination of subjects such as ergonomics and other HCI issues.