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G063 - Mental Models

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The Psychology of HCI design Learning Objectives: By the end of this topic you should be able to: define the term Mental Model describe how Mental Models ... – PowerPoint PPT presentation

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Title: G063 - Mental Models


1
G063 - Mental Models
The Psychology of HCI design
2
Learning Objectives
  • By the end of this topic you should be able to
  • define the term Mental Model
  • describe how Mental Models can be applied to
    the design of a user interface
  • discuss the importance of designing a system
    model which matches the user's mental model

3
(No Transcript)
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PowerPoint
Word
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Word v2
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Word 2003
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Word 2007
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Mental Models
  • we view the world as a series of causes and
    effects
  • if I do this, then that will happen
  • we have preconceived ideas in our mind
  • of how things should work
  • preconceived ideas mental model
  • mental models relate causes to effects
  • we can predict the results of an action based on
    prior experience
  • Ive seen this before, so I think that will also
    happen this time
  • mental models form the basis of any further
    interaction with a system

9
Mental Models and designing an HCI
  • users will bring their own mental models to a
    system
  • mental models form the basis of interactions with
    a system
  • users will predict the behaviour of a system
  • based on past experiences
  • many users learn to use a system by trial and
    error
  • using their mental models

10
Mental Models and designing an HCI
  • HCI designers must consider users mental models,
  • if interface matches mental model then
    intuitive use
  • need to design systems to match mental models
  • convergence between mental model system model

11
Effect of Mental Model on user
  • Users
  • find a new system easy to learn and remember
  • be more confident using the system
  • know what is likely to happen next as a result of
    the current action
  • beep error,
  • trashcan is used to delete files
  • red for bad, green for good
  • icons on toolbars give a preconception of use
  • require less training
  • wont get lost while using the system
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