4.3.3. - Human Computer Interface - Design Factors
- Created by: Annie
- Created on: 28-04-13 20:57
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- HCI - The Design Factors
- Consistency
- SIgnposting
- Icons, navigation system etc.
- Should remain consistent over a software package and operating system
- Pop-up Information
- Pop-up messages in dialogue boxes (saving, printing etc.)
- Tool tips - hovering over features to get yellow labels
- Consistency makes new software much easier to use and makes it more saleable
- SIgnposting
- On screen help
- Searchable help systems by keywords or index
- Help for users should be straight forward and use examples
- Context sensitive help can take the user to the appropriate part of the help system
- On screen help has become so good that many software manuals don't come with the product
- Wizards often provide good step by step guides
- Most people won't read the user manuals
- Layout appropriate to the task
- Nature of the audience is key..
- Example 1: CAD Software
- Menus with a wide range of options
- Detailed layout with a range of customisable toolbars
- Clear working area on central screen
- Example 2: Children's Software
- Bright distinct colours and clear graphics
- Uncluttered Layout
- Easy to read font style - such as Arial
- Differentiation between user expertise
- Professional users will expect to be able to create a refined, detailed product
- Will need shortcut keys, infinite colour palette etc.
- Old, Young, Professional, Amateur etc.
- Amateurs will be less concerned about specific details
- For example, designing a room
- Software will need to be easy to use and have many wizards
- Professional users will expect to be able to create a refined, detailed product
- Clear Navigational Structure
- Software which does not make the next step clear will frustrate users
- Wizards should have buttons in similar places although the next button should be in the same place to avoid mouse movement
- What do I do next?
- Backwards and forward buttons on internet browsers in the same place
- Use by disabled people (accessibility)
- Users may be blind, deaf, dumb or have mobility problems
- On screen messages could appear instead of sounds (for keyboard errors etc.)
- Colour blindness needs to be accounted for in the default layout
- Braille keyboards and printers for the blind
- Screen readers may be available for blind users and voice dictations may be used as an input
- Choice of font styles/sizes and screen magnifiers for people with partial blindness
- The use of voice and eye movements for computer control
- Consistency
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