Q. Provide an example of consistency in the design of a word processor's user interface.

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Q. What does the principle of "Dialog initiative" refer to in the context of interaction between the user and the system?

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Q. Which type of dialog hinders flexibility from the user's perspective?

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Q. In what situation might a system pre-emptive dialog be necessary or desirable?

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Q. What can designers do to minimize the likelihood that the user will be prevented from initiating some task at a time when they wish to do so in a completely user pre-emptive dialog?

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Q. What is the definition of a thread in the context of the user-system dialog?

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Q. What does multi-threading of the user-system dialog allow?

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Q. What is an example of concurrent multi-threading in a multi-modal dialog?

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Q. What dimension characterizes how separate modalities are combined to form a single input or output expression in a multi-modal system?

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Q. In a windowing system, how does each window represent a different task in the multi-threaded dialog?

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Q. What is task migratability concerned with?

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Q. Why is spell-checking a good example of the need for task migratability?

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Q. What is the concept of substitutivity?

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Q. What is representation multiplicity in the context of substitutivity?

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Q. How does equal opportunity blur the distinction between input and output?

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Q. What is the principle of "If you can see it, you can use it!" according to Thimbleby?

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Q. How is customizability defined with respect to the user interface?

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Q. What is the difference between adaptability and adaptivity in the context of customizability?

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Q. What is an example of lexical customization in customizability?

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Q. What does observability refer to in the context of robustness?

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