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Revision Lecture: Design and Requirements Human-Computer Interaction Comp 3900 and Comp 6390 Semester 2, 2010 1 Lecture 4A: Human-Computer Interaction, Semester 2, 2010
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Design Donald Norman (2002) Design of Everyday Things , Basic Books Design of everyday objects from the point of view of the user Lecture 4A: Human-Computer Interaction, Semester 2, 2010 2 The ideas and principles carry over to the design of human-computer interaction
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Psychopathology of everyday things A study of the difficulties that ordinary people have in using everyday things and an analysis of user-centred design principles that could be applied to prevent these difficulties. Lecture 4A: Human-Computer Interaction, Semester 2, 2010 3 Examples that illustrate these difficulties: Handles/knobs on doors Buttons on lifts
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User-centred design principles Affordances Conceptual models Make things visible Good mappings between interface and Lecture 4A: Human-Computer Interaction, Semester 2, 2010 4 action Provide feedback on user’s actions Constraints Forcing functions
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Affordance The service or resource that an object provides to a particular type of user. Examples: Webcam/microphone lets a user see and Lecture 4A: Human-Computer Interaction, Semester 2, 2010 5 talk with his or her friends and vice versa Security camera lets the guards see what is happening in the building but the people in the building can not see the guards
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