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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
How would you describe..?
  • how to use a light switch
  • how to engage 1st gear in a Ferrari sports car
  • how to select ITV on a TV
  • how to pause a DVD or music track or recorded
    programme
  • how to launch Word on a Windows computer

3
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

4
(No Transcript)
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PowerPoint
Word
6
Word v2
7
Word 2003
8
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
  • we 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 interaction
    with an HCI

10
Mental Models and designing an HCI
  • A system designer needs to consider that
  • users will bring their own mental models to a
    system
  • This means that
  • users tend to learn to use a new system by trial
    and error
  • using what they already know
  • users will try to predict the behaviour of a new
    system
  • based on their past experiences

11
Importance of matching the HCI to the user's
mental model.
  • So .... HCI designers must consider users mental
    models,
  • because ......
  • if HCI matches mental model then intuitive use
  • if HCI looks and behaves in a familiar way
  • a user will find a new system easy to learn and
    remember
  • know what is likely to happen next as a result of
    an action
  • be confident using the system
  • if HCI is inconsistent with the mental model,
    user may get lost using the interface

12
Importance of matching the HCI to the user's
mental model.
  • less training time required
  • because HCI will be what user expects
  • increased productivity
  • as less training is required
  • less resistance to using the new HCI
  • as it works the way they think it should
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