Q. What is the primary challenge in predicting human behavior for designing interactive systems?

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Q. Why are some models of human users not useful at early and abstract stages of design?

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Q. What is the importance of conducting experiments for testing usability properties of designs?

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Q. What is the significance of making experimental systems resemble the final product?

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Q. What is the challenge in the principled approach to interactive system design?

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Q. What is the "chicken-and-egg puzzle" in interactive system design?

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Q. Which approach to interactive system design relies on early understanding of user tasks?

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Q. What was the main limitation of traditional software life cycles for interactive system design?

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Q. What is one limitation of the traditional software life cycle in supporting user tasks?

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Q. Which category of design approaches aims to better suit the design of interactive systems?

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Q. What type of information should a notation for the design of interactive systems reflect?

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Q. Which feature of the graphics drawing package allows the user to retain object identity while manipulating images?

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Q. What is the main advantage of the user-centered design approach?

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Q. Why is it difficult to predict the cognitive demands of an abstract design without user-centered techniques?

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Q. What is the emphasis of usability engineering?

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Q. What is the ultimate test of a product's usability?

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Q. What does the usability specification in the requirements specification focus on?

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Q. What does recoverability in the usability context refer to?

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Q. Why is usability engineering limited in its application?

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Q. What is the purpose of defining the attribute "backward recoverability" in terms of a measuring concept?

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