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Five key points that should be taken into account in the design of dialogue and screen layout.

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Casual/novice User :-

  • Have no prior knowledge of what is expected of them.
  • Must be guided step-by-step through interaction with machine.
  • Must be prompted for responses in a clear and understandable way.
  • If there is a widespread idiom for a particular type of application it should be followed.
  • Speed of operation of the system is less demanding as users require thinking time.

 

Experienced User :-

  • Whilst they may be familiar with common systems, any new system will be unfamiliar to them.
  • It is likely there will be areas of the system that are new to a user and for this area they will be casual users.
  • Resources for training and advice should be made available to take into account the varying ability of users.
  • Little prompting information should be displayed as too much is distracting.
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