Nine principles of design Simple and natural dialog Speak the user’s language Minimize user’s...

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Nine principles of design

• Simple and natural dialog

• Speak the user’s language

• Minimize user’s memory load

• Be consistent

• Provide feedback

• Provide clearly marked exits

• Provide shortcuts

• Deal with errors in a positive manner

• Provide help

Other methods include:

• Introspection method

• Direct observation

simple observation

think-aloud

constructive interaction

• Query via interviews, retrospective testing and questionnaires

• Continuous evaluation via user feedback and field studies

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