HCI stands for Human Centered Interaction, which means the interaction between users (people) and computers. This includes different areas of study such as psychology, fine arts, computer science. The whole concept revolves around better interaction between machines and users, including the design, evaluation, the grasp and of course the implementation of interactive communication system for better human use. HCI is also referred to as man–machine interaction (MMI) or computer–human interaction (CHI). It involves the study, planning and design interaction between these two subjects, because Human Centered Interaction studies a human and a machine in concurrence. In the machines side, techniques in computer graphics, operating systems, programming language and development environment are relevant areas. In the human side, communication theory, graphic, industrial design, linguistic, social sciences, cognitive and human factors are taken into thought and action. HCI differs from human factors because it focuses more on users working exclusively with computers, rather than other kinds of machines or designed artifacts. In HCI there is a fair amount of focus on how to execute the computer software and hardware mechanisms to support human–computer interaction. Thus, human factors being a broader term can not be used exclusively for HCI; HCI could be described as the human factors of computers. There is less focus on work-oriented tasks and actions and less stress on physical forms or industrial designs of the user interface, example keyboards, there fore it also differs from human factors. Three areas of study overlap with HCI, though there focus shifts. Human interactions with the computer are given precedent in the study of personal information management (PIM). People can work with many forms of information; some may be computer based, in order to understand the desired effects in their surrounding. In computer-supported cooperative work (CSCW), emphasis is placed on the use of computing systems in support of the collaborative work of a group of people. Human interaction management (HIM) extends the scope of CSCW to an organizational level which can be implemented without use of computer systems. Displays are human-made artifacts designed to support the view of relevant system variables and to further assist the processing of that information. A task that the display is to support has to be defined before a display is designed (e.g. navigating, controlling, decision making, learning, entertaining, etc.). A user/operator must be able to process whatever information a system generates and displays; hence the information must be presented in a manner which will support perception, situation awareness, and understanding. The human–computer interface can be described as the point of communication between the user (human) and the computer (machine). Now to describe the human-computer interface we need to look at several aspects including the loop of interaction which exposes several points of information. Loop of interaction is the flow of information between the human and computer. The loop of interaction has several aspects to it including:
Task environment: The conditions and goals set upon the user; what tasks the user has to achieve etc Machine environment: The environment that the computer is connected to, e.g. a laptop in a college student's dorm room, or a work environment in an office etc Areas of the interface: Non-overlapping areas involve processes of the human and computer not pertaining to their interaction. Meanwhile, the overlapping areas only concern themselves with the processes pertaining to their interaction. Input flow: The flow of information that begins in the task environment, when the user has some task that requires using their computer to process what ever data that is at hand. Output: The flow of information that originates in the machine environment, syllabus, assignment work etc. Feedback: Loops...
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