HCI 3 (Cognitive Processing)

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  1. Cognitive processing involves the following 6 sub-processes..
    • Perception
    • Attention
    • Memory
    • Learning
    • Language
    • Problem Solving
  2. What are tthe 2 different types of cognition according to Norman?
    • Experiential Cognition
    • Reflective Cognition
  3. Define features of Reflective Cognition (2 circumstances, 5 processes in problem solving)
    • > circumstances
    • correct action is not obviously signalled by the system
    • we dont have a memorised rule that applies for the current situation/goal (lack of proceduralised knowledge)

    • >problem solving
    • extrapolating from existing knowledge (memory systems)
    • may be simple, e.g. making a decison
    • logical reasoning might supply answer
    • mental models may predict outcome
    • reasoning my analogy/metaophor is powerful and natural
  4. Name two models of cognitive processing
    • MHP (Model Human Processor)
    • De Norman 7 stage model
  5. State the features of the MHP (3 + 2 limitations)
    • models information processes of user interacting with the computer
    • predict cognitive processes involved
    • enables calculation of predicted time to complete tasks

    • limitations
    • - based on modelling mental activities that happen exlusively inside the head
    • - does not addequately account for how people interact with computers/devices in the real world
  6. draw Normans 7 stage model
    Image Upload
  7. draw normans "execution bridge(s)" between physical system and goals
    Image Upload
  8. state the three types of limitaitons reflective cognition
    • logical reasoning (we are bad at it)
    • decision making
    • confirmation bias
  9. explain the decision making limitatino of reflective cognition (hick-hyman)
    • hick-hyman law
    • Image Upload
  10. What is a mental model?
    • knowledge can be described knowledge as mental model/conceptual model:
    • - how to use system (what to do next)
    • - what to do with unfamiliar systems / unexpected sitations (how the system works)
    • Image Upload

    people use mental models for inferences (heating example)
  11. In what way is the distributed cognition model different to the traditional model?
    it takes into account that cognition is spread across people, places, interface and representations (e.g. air plane carrier)
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HCI 3 (Cognitive Processing)
2013-05-13 16:39:25
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