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Mobile HCI

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Interface describes the physical aspects of a computer-based system ... display eyeglasses. Mobile Usability. The device itself. The applications on the device ... – PowerPoint PPT presentation

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Title: Mobile HCI


1
  • Mobile HCI

2
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3
What is HCI ?
  • Interaction or Interface ?
  • Interface describes the physical aspects of a
    computer-based system which the user experiences
    directly.
  • HCI is a broader, interdisciplinary field which
    is
  • concerned with the design, evaluation
    implementation of interactive computing systems
    for human use and with the study of major
    phenomena surrounding them (ACM SIGCHI)
  • The goals of HCI are to develop or improve the
    safety, utility and effectiveness of systems that
    include computers, often through improving
    usability .

4
Why is Usability important ?
  • Usability concerns how easy and intuitive a
    system is to use. Without it there can be
  • User frustration
  • Stress
  • Users may reject the application or device
  • Increased errors - what IS an error ?

5
Usability Utility
  • Utility concerned with what the system does
  • if systems dont do what users want, then no
    amount of interface design will turn them into
    good systems
  • Usability concerned with how the functionality is
    implemented
  • poorly designed interfaces can destroy a
    potentially useful system

6
Definitions of Usability
  • Usability can simply be thought of as the
    practical implementation of good HCI, but, more
    formally
  • The usability of a system is the extent to which
    a product can be used by specified users to
    achieve specified goals with effectiveness,
    efficiency and satisfaction in a specified
    context of use.
  • ISO 9241-11 (International Standards
    Organisation)
  • (See also ISO 14915 - Design of the User
    Interface of Multimedia Applications
  • and ISO 13407 - Human-centred Design
    Processes for Interactive Systems)

7
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8
Various Interactions
9
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10
Watches
11
What do we define as mobile
12
Miniature Head-up Displays
MicroOptical prescription display eyeglasses
13
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14
Mobile Usability
  • The device itself
  • The applications on the device

15
Device
  • Issues include
  • Battery life
  • Footprint
  • Modification
  • Physicality
  • Environment etc

16
Programs
  • Interface design
  • Interaction design
  • usability

17
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18
Dimensions of Usability
  • Does the user feel in control of the application
    ?
  • To what extent can the user achieve their goals
    using the application ?
  • How far does the product appear to assist the
    user ?
  • How easy is the application to learn ?
  • How does the user respond emotionally ?

19
Unique and Hard
  • Mental models
  • No of Handheld devices
  • Used more and more frequently
  • Environments etc

20
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21
Lots of Phones
22
Anytime Anywhere
23
Whats Next
  • In the next lecture from me we will
  • Breakdown HCI
  • How do we carry out usability testing etc
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