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Human-Computer Interaction Introduction to HCI

Human-Computer Interaction Introduction to HCI. LEARNING OUTCOME. Define HCI Why HCI is Important Describe the Model Human Processor. Overview of HCI. Definition of HCI.

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Human-Computer Interaction Introduction to HCI

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  1. Human-Computer InteractionIntroduction to HCI

  2. LEARNING OUTCOME • Define HCI • Why HCI is Important • Describe the Model Human Processor

  3. Overview of HCI

  4. Definition of HCI • Human-computer interaction is a discipline concerned with the design, evaluation and implementation of interactive computing systems for humanuse and with the study of major phenomena surrounding them. (ACM SIGCHI, 1992, p.6) • Other terms: user interface, man-machine interface, ergonomics, human factors

  5. Intro • What is a user interface? • Why do we care about design? • We see this all the time. • What’s good about the design of this error box? • The user knows there is an error • What’s poor about the design of this error box? • Discouraging • Not enough information • No way to resolve the problem (instructions or contact info)

  6. M1: Introduction to HCIH… C… I… • Human - the end-user of a program - the others in the organization • Computer - the machine the program runs on • Interaction - the user tells the computer what they want - the computer communicatesresults

  7. Why is HCI Important? • HCI has a role in the design and development of all kinds of computer systems. • Harnessing the computer’s power is a task for designers who understand the technology and are sensitive to human capacities and needs (human factors). • Applications developers who apply human-factors principles and processes are producing exciting and useful interactivesystems.

  8. Introduction to HCI • Human-Computer Interaction (HCI) is about designing computer systems that support people so that they can carry out their activitiesproductively and safely. (Preece, p.1) • HCI studieshuman performance in the use of computer and information systems. This is a rapidly expanding research and development area.

  9. Why HCI is Important • The study of our interface with information. • It is not just ‘how big should I make buttons’ or ‘how to layout menu choices’ • It can affect • Effectiveness • Productivity • Morale • Safety • Example: a car with poor HCI

  10. A Brief History of Computing • From calculation to information processing • From offline-processing to online interaction • From house-size to palm-size • From expert’s tools to end-user computing

  11. Component disciplines of HCI • Computer science • Cognitive Psychology • Ergonomics and human factors • Linguistics • Artificial intelligence • Philosophy, Sociology, Anthropology • Design and Engineering “HCI is the neither the study of humans nor the study of technology, but rather the bridging between those two.” Preece, p42.

  12. Specific Human factors Design Goals • Preece (p.14-15) describes “the goals of HCI are to produce usable and safe systems, as well as functional systems”. • Goals include: o Safety (eg safety-critical systems) o Utility (functionality) o Effectiveness (intuitive) o Efficiency (task achievement) o Usability (easy to learn and use)

  13. Design Evaluate Prototype HCI/UI Design Cycle

  14. Model Human ProcessorFormulated by Card, Moran and Newell (1983)

  15. The three Subsystem

  16. Input-output channels • Input in human through the senses • Output through motor control • Three (3) primary senses: • Vision • Hearing • Touch

  17. Vision • Perceiving size and depth • Perceiving brightness • Perceiving color

  18. Hearing • The auditory system convey information of the environment • Processing sound • Pitch • Loudness • Cocktail party effect

  19. Touch • Virtual reality • Feedback responses

  20. Activity 1: Test memory • 1 bun 6 sticks • 2 shoe 7 heaven • 3 tree 8 gate • 4 door 9 wine • 5 hive 10 hen

  21. End

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