HCI (GCSE ICT WJEC IT3)

HCI (GCSE ICT WJEC IT3)

1. GUI (Graphical User Interface)

   • Advantages
     • Easy to navigate
     • Uses windows. Icons, menus, pointers
       • Easier for novices
     • Help guides and keyboard shortcuts for experts
   • Disadvantages
     • Takes a lot of memory
     • A lot of processor power is needed
     • Slows for experts who just want to get things done
       • Programmers
   • Aimed at novice and intermediate users

2. CLI (Command line interface)

   • Need to know code
   • Aimed at expert users
   • Advantages
     • Fast for experts
     • Little memory needed
     • Very little processing power needed
     • Does not need expensive hardware
   • Disadvantages
     • Difficult for beginners to use
     • Have to remember commands
     • If you make a mistake, have to type out the whole command again

3. Menu Driven

   • Advantages
     • Good for beginners
       • Everything in logical places
     • No expert language to learn
     • Don't need a lot of processing power
     • Often used of phones or TV systems
   • Disadvantages

4. Voice Driven

   • Disadvantages
     • Have to train the computer
     • Can often make mistakes
     • Have to speak slowly and clearly
       • Hard to interpret accents
   • Advantages
     • Excellent for people who are unable to interact with a computer via keyboard and mouse
     • Can be faster than typing an essay for example
     • Good for novices
     • Can save time

5. Touch sensitive devices

   • Advantages
     • More intuitive for beginners
     • Very interactive and fun
     • More tactile
     • Very common in smart phones or tablet PCs
     • More practical and hands on
   • Disadvantages
     • Difficult for people with accessibility issues
       • No feedback
     • Can be easily damaged
     • Currently limited in functionality

6. Biometrics

   • Advantages
     • Secure way of protecting information
     • Very difficult for copying and hacking
     • Faster than entering passwords
   • Disadvantages
     • Very expensive technology
     • What happens if person is not available?
     • Biometric data can be stolen.
       • Can't change fingerprint or eyes