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About Face 3: The Essentials of Interaction Design by David Cronin, Robert Reimann, Alan Cooper

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Appendix A. Design Principles

Chapter 1

  • Interaction design is not guesswork.

Chapter 2

  • User interfaces should be based on user mental models rather than implementation models.

  • Goal-directed interactions reflect user mental models.

  • Users don’t understand Boolean logic.

  • Don’t replicate Mechanical-Age artifacts in user interfaces without Information-Age enhancements.

  • Significant change must be significantly better.

Chapter 3

  • Nobody wants to remain a beginner.

  • Optimize for intermediates.

  • Imagine users as very intelligent but very busy.

Chapter 5

  • Don’t make the user feel stupid.

  • Focus the design for each interface on a single primary persona.

Chapter 6

  • Define what the product will do before you design how the product will do it.

  • In early stages of design, pretend the interface is magic.

Chapter 7

  • Never show a design approach that you’re not happy with; stakeholders just might like it.

  • There is only one user experience — form and behavior must be designed in concert with each other.

Chapter 9

  • Decisions about technical platform are best made in concert with interaction design efforts.

  • Optimize sovereign applications for full-screen use.

  • Sovereign interfaces should feature a conservative visual style.

  • Sovereign applications should exploit rich input.

  • Maximize document views within sovereign applications.

  • Transient applications must be simple, clear, and to the point.

  • Transient applications should be limited to a single window and view.

  • A transient application should launch to its previous position and configuration. ...

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