Interactive Systems Design

mashpeemoveMobile - Wireless

Nov 24, 2013 (3 years and 6 months ago)

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Interactive Systems Design

Mobile Interactive System
Evaluation

Learning Outcomes


You will be able to:


Design the interfaces and interaction
design of mobile designs for specific
scenarios.


Discuss issues related to the design and
evaluation of mobile interactive systems


Explain the role of context in mobile
usability

Learning Outcomes


You will be able to:


Discuss issues related to multimodal
interaction


Explain and critique a range of different
kinds of usability evaluation methods for
evaluating mobile usability


Evaluate mobile devices by selecting and
using appropriate usability evaluation
methods.

Context


The changing situation the system is
deployed in


Physical context


Technological context


Social context


Why is context more important when
evaluating a mobile system?


Navigation System
Study


Can you evaluate an in
-
car navigation system
in a lab?


I did a diary study in a real situation (holiday)


noting critical incidents


I then used cognitive walkthrough based on
scenarios generated from the study to give
analytical power / explanatory power



so its more than just anecdotal


looking for causes (see human error discussion)


In what ways did context arise as important?


What is good / bad about the methodology?

Mobile Evaluation Methods


What matters most that you get right in
mobile designs?


What do you need to evaluate?


Are user experience goals of greater
importance for personal, mobile computing?


Are personal goals?


Does context make any difference to how you
evaluate?


Why is context hard for evaluation methods to
deal with?

Critiquing Methods


Critique an evaluation method of your
choice for mobile systems evaluation.



What will it do well?


What will it do poorly
-

what issues will it miss?


Can usability evaluation methods deal with
context?


To what extent can they deal with multi
-
modal
interfaces?

Audio Clouds


Use 3D sound output, gestural input


Read Output, Feb 2005, page 6 on
Brewster’s work


What is meant by an audio display?


What are earcons and tactons?


How do you evaluate such systems?

Audio Clouds


How do you evaluate devices based on
a novel system?


In a lab?


Using expert usability methods (who has
expertise if it has never been done
before)?

Further reading (for example)

Marentakis, G. and Brewster, S. A. (2004) A Study on Gestural Interaction
with a 3D Audio Display, Mobile HCI.

Evaluation of Mobile and
Multimodal Systems

What is the best usability evaluation method?


Can usability evaluation methods deal with
multimodal interfaces?


Would they detect, for example, situations where
the interface requires we do sense and process
several things at once



Think of a usability evaluation method and
critique it with respect to the above.


What issues arise in trying to evaluate
mobile systems over desk
-
top systems?


Which evaluation methods are
appropriate for mobile evaluation and
why?


How do evaluation methods need to be
modified to deal with mobile
applications?

Next Week’s Reading


On Usability of Medical Devices

Read:


H. Thimbleby. Ignorance of Interaction Programming Is Killing People.
ACM Interactions, September+October, 2008, pp 52

57.


H. Thimbleby. User
-
centered Methods are Insufficient for Safety Critical
Systems. USAB'07


Usability & HCI for Medicine and Health Care,
Lecture Notes in Computer Science 4799, edited by A. Holzinger,
Springer Verlag, 2007, pp 1

20. [especially pages 1
-
9]


J. C. Campos and M. D. Harrison. Interaction Engineering Using the
IVY Tool. ACM SIGCHI Symposium on Engineering Interactive
Computing Systems, EICS'09, edited by G. Calvary, T. C. N. Graham
and P. Gray, Pittsburgh, 2009, pp 35
-
44.


H. Thimbleby and P. Oladimeji. Social Network Analysis and Interactive
Device Design. ACM SIGCHI Symposium on Engineering Interactive
Computing Systems, EICS'09, edited by G. Calvary, T. C. N. Graham
and P. Gray, Pittsburgh, 2009, pp 91

100.