16-07-2014, 11:57 AM
Human Computer Interface (HCI)
Human Computer.ppt (Size: 363.5 KB / Downloads: 242)
Menu Driven Interfaces
Uses menus to communicate with user
Advantages
No need to learn complex commands
Easier for novice user to learn than CLI
Ideal if there are limited options
Disadvantages
User interface limited by screen space
Can frustrate expert user
Does not have visual elements of GUI
Graphical User Interface (GUI)
Combines pictures & text
Accepts input via devices such as keyboards & mouse
Offers graphical icons and visual indicators
E.g. Microsoft Windows
Advantages
Intuitive and easy to navigate (sounds, pictures incorporated)
Good for novice users
Disadvantages
Resource hungry – can be slow on old machines
Hidden commands must be found using help
HCI Questions
Explain the meaning of the term ‘human-computer interface’ (2)
Describe a human-computer interface that can be used with a particular type of disability (4)
Questions
Name four factors which must be taken into account when designing a good user interface. Explain why each factor is important. (8)
Explain one way in which the needs of an expert user and a novice user can be accommodated when designing the HCI for a piece of software. (2)
Biometric Devices
Iris Recognition
Hand Prints
Advantages
Difficult to forge
No smart cards to lose
Disadvantages
Human rights?
New technology = little trust & bugs in system