From Johnson, P. (1992) "Human
Computer Interaction: Psychology, Task Analysis and Software Engineering"
"Human-computer interaction
(HCI) is the study of the interaction between people, computers
and tasks. It is principally concerned with understanding how people
and computers can interactively carry out tasks, and how such interactive
systems are designed."
HCI a multidisciplinary subject:
Science,
Engineering,
Graphic Design
People and tasks:
(The interface more than what a user can see, touch and hear)
HCI is concerned with user's:
knowledge;
understanding;
problem solving;
learning