HCI-lect -01.pdf

HCI Lecture One 1 Reference ALAN DIX, JANET FINLAY, GREGORY D. ABOWD, RUSSELL BEALE THIRD EDITION HUMAN–COMPUTER INTERACTION 2 WHAT IS HCI? The term human–computer interaction has only been in widespread use since the early 1980s, but has its roots in more established disciplines. Systematic study o...

HCI Lecture One 1 Reference ALAN DIX, JANET FINLAY, GREGORY D. ABOWD, RUSSELL BEALE THIRD EDITION HUMAN–COMPUTER INTERACTION 2 WHAT IS HCI? The term human–computer interaction has only been in widespread use since the early 1980s, but has its roots in more established disciplines. Systematic study of human performance began in earnest at the beginning of the last century in factories, with an emphasis on manual tasks. 3 WHAT IS HCI? The Second World War provided the force for studying the interaction between humans and machines, as each side strove )‫ (جاهد‬to produce more effective weapons systems. As computer use became more widespread, an increasing number of researchers specialized in studying the interaction between people and computers. 4 WHAT IS HCI? HCI draws on many disciplines, but it is in computer science and systems design that it must be accepted as a central concern. HCI involves the design, implementation and evaluation of interactive systems in the context of the user’s task and work. 5 WHAT IS HCI? However, when we talk about human–computer interaction, we do not necessarily imagine a single user with a desktop computer. By user we may mean an individual user, a group of users working together, or a sequence of users in an organization, each dealing with some part of the task or process. The user is whoever is trying to get the job done using the technology. 6 WHAT IS HCI? By computer we mean any technology ranging from the general desktop computer to a largescale computer system, a process control system or an embedded system. The system may include non-computerized parts, including other people. By interaction we mean any communication between a user and computer, be it direct or indirect. 7 THEORY AND HCI Unfortunately for us, there is no general and unified theory of HCI that we can present. Indeed, it may be impossible ever to derive one; it is certainly out of our reach today. However, there is an underlying principle that forms the basis of our own views on HCI, and it is captured in our claim that people use computers to accomplish work. 8 THEORY AND HCI This outlines the three major issues of concern: the people, the computers and the tasks that are performed. The system must support the user’s task, which gives us a fourth focus, usability: if the system forces the user to adopt an unacceptable mode of work then it is not usable. 9 THEORY AND HCI This word ‘task’ or the focus on accomplishing ‘work’ is also problematic when we think of areas such as domestic appliances, consumer electronics and e-commerce. There are three ‘use’ words that must all be true for a product to be successful; it must be: 10 THEORY AND HCI Useful: accomplish what is required: play music, cook dinner, format a document. Usable: do it easily and naturally, without danger of error, etc. Used: make people want to use it, be attractive, engaging, fun, etc. 11 Thank You 12