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Understanding and Conceptualizing Interaction

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Understanding and Conceptualizing Interaction Chapter 2 Understanding the problem space What do you want to create? What are your assumptions? Will it achieve what ... – PowerPoint PPT presentation

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Title: Understanding and Conceptualizing Interaction


1
Understanding and Conceptualizing Interaction
  • Chapter 2

2
Understanding the problem space
  • What do you want to create?
  • What are your assumptions?
  • Will it achieve what you hope it will?

3
A framework for analysing the problem space
  • Are there problems with an existing product?
  • Why do you think there are problems?
  • Why do you think your proposed ideas might be
    useful?
  • How would you see people using it with their
    current way of doing things?
  • How will it support people in their activities?
  • Will it really help them?

4
Conceptual model
  • Need to first think about how the system will
    appear to users (i.e. how they will understand
    it)
  • A conceptual model is a high level description
    of
  • the proposed system in terms of a set of
    integrated ideas and concepts about what it
    should do, behave and look like, that will be
    understandable by the users in the manner
    intended

5
Users model, Design model, System image
6
Conceptual models based on activities
  • Giving instructions
  • issuing commands using keyboard and function keys
    and selecting options via menus
  • Conversing
  • interacting with the system as if having a
    conversation
  • Manipulating and navigating
  • acting on objects and interacting with virtual
    objects
  • Exploring and browsing
  • finding out and learning things

7
Interface analogies to physical behavior
  • WYSIWYG
  • Direct manipulation
  • Continuous representation of objects and actions
    of interest
  • Physical actions and button pressing instead of
    issuing commands with complex syntax
  • Rapid reversible actions with immediate feedback
    on object of interest

8
Conceptual models based on objects
  • Usually based on an analogy with something in the
    physical world
  • Examples include books, tools, vehicles
  • Classic Star Interface based on office objects

Johnson et al (1989)
9
Another classic the spreadsheet (Bricklin)
  • Analogous to ledger sheet
  • Interactive and computational
  • Easy to understand
  • Greatly extending what accountants and others
    could do

www.bricklin.com/history/refcards.htm
10
Conceptual models based on interface metaphors
  • Similar in some way to aspects of a physical
    entity (but also with its own behaviors and
    properties)
  • Example Desktop, typewriter,
  • Pro makes learning a new system easier.
  • Question are dissimilarities a problem?

11
Interaction paradigms
  • Alternative interaction paradigms
  • Ubiquitous computing
  • Pervasive computing
  • Wearable computing
  • Augmented reality
  • Tangible bits
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