Q. What does WYSIWYG stand for?

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Q. How many interpretations of WYSIWYG does Harold Thimbleby mention?

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Q. What is the property of "result transparency" in the context of observability?

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Q. What is the key difference between "result transparency" and "transparency"?

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Q. What is the term used to describe the process by which a user explores the current state of an interactive system?

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Q. What is the advantage of a passive strategy for observing the system's state?

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Q. What is the "observable effect" in the context of an interactive system?

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Q. What does the principle of "result observability" state?

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Q. What does the principle of "full predictability" require?

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Q. What does the principle of "reachability" in interactive systems address?

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Q. hat issue does the principle of "reachability" help prevent?

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Q. What is the key characteristic of a system that is "reachable"?

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Q. Why might the principle of "reachability" alone not be sufficient to ensure user satisfaction?

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Q. What is the main requirement for an undo feature in interactive systems?

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Q. What formal condition defines the behavior of the undo feature?

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Q. Why is the basic undo requirement inconsistent for systems with more than two states?

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Q. What is the main drawback of the basic undo requirement?

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Q. What aspect of interaction do models focused on "Timing" primarily address?

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Q. Which of the following is a distinguishing feature of the "Windowed systems" model?

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Q. What do models addressing "Attention" aim to describe?

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