Question 4

a) The Human-Computer Interaction (HCI) involves two main entities, these are the human entity and the computer entity. To help in designing a 4 usable computer system, we need to understand the human aspects from the cognitive, social, and organisational perspectives. Assuming you are the lecturer for the day, explain stating the difference between these three (cognitive, social, and organisational) perspectives.

b) The arrangement of information on the interfaces display is important to avoid frequent movement of eyes by users while searching for information. The frequent movement of eyes would cause the eyes to constantly refocus and this action would easily tire the eyes. Elaborate on five (5) considerations in designing a system interface.

c) Colour plays an important role in determining the identity and shape of an object. Explain in your own words the three components that forms colour.