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CSCI 4800/6800 Human-Computer Interaction

CSCI 4800/6800 Human-Computer Interaction. Eileen Kraemer eileen@cs.uga.edu 1/11/05. Course content. Design, implementation, evaluation of user interfaces for computer systems Take into account: human factors usability design process Topics include:

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CSCI 4800/6800 Human-Computer Interaction

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  1. CSCI 4800/6800Human-Computer Interaction Eileen Kraemer eileen@cs.uga.edu 1/11/05

  2. Course content • Design, implementation, evaluation of user interfaces for computer systems • Take into account: • human factors • usability • design process • Topics include: • effects of human capabilities and limitations on interaction with computer systems • Ethics and rules for working with human subjects • Experimental design and statistical analysis • “New” topics in HCI

  3. Projects .. • Students will apply these concepts to the design and implementation of graphical user interfaces. • Java will be used for UI design; guidelines for such use will be discussed

  4. What do you already know?: “Folk” HCI • “Folk” theories (e.g. folk psychology, folk physics) help in everyday explanations (e.g. why people do things, what will happen to cartoon character when he runs off cliff…) • Folk HCI: Our intuitive knowledge about usability and explanations

  5. However …. • Folk theories are often wrong w.r.t. scientific/engineering analyses …

  6. Speed of response Regularity of response Intuitiveness Familiarity Legibility Navigability Freedom from error Expected feedback Absence of visual clutter Clear what to pay attention to .. All good ideas, but: What do they really mean? How do we achieve them? “Folk” definitions of usability

  7. Understanding humans • Humans = sensory processors • Sensory psych., EE & CS systems • Humans = interpreters/predictors • Cog. Psych and AI • Humans = actors in environments • Activity theory, ethnograpy, ecological psychology • Question: How much and how rapidly do humans change?

  8. What makes a system usable? • Humans = sensory processors • Usability == fit with human limits • Humans = interpreters/predictors • Usability == fit with knowledge • Humans = actors in environment • Usability == fit with task and social context

  9. Two views of interaction • Interaction with: • Software system is tool or machine • Interface is a usability-engineered membrane • Human-as-processor and interpreter model • Interaction through: • Software is a medium used to interact with task objects or other people • Software must make affordance visible • Human-as-interpreter & -actor models

  10. Broadening the Cognitive Framework • Recent developments in cognitive psychology • From human factors to human actors • Cognition and action as social[Vygotsky] • Distributed cognition • Use of artifacts as external memories[Hutchins]

  11. Affordances • “What sort of operations and manipulations can be done to a particular object” [Norman] • Examples: • Handles • Scroll bars • Other “virtual” affordances such as icons

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