1. Take out your mobile phone,
dial a number,
but imagine you are blind.
Krajnc E., Feiner J., Schmidt S.

2. User Centered Interaction Design
for Mobile Applications
Focused on Visually Impaired
and Blind People
Elmar Krajnc, Johannes Feiner, Stefan Schmidt
USAB 2010, 4.-5. November 2010, Klagenfurt
Krajnc E., Feiner J., Schmidt S.

3. Project Ways4all
Routing and way finding
Indoor navigation
Communication with public transport
Integration in one device, a mobile phone
This paper: a barrier free UI
Krajnc E., Feiner J., Schmidt S.

4. User Centered Design
Know your user
Survey
Interviews
Personas
Krajnc E., Feiner J., Schmidt S.

5. User Centered Design
Result - concept for a user interface
Textual interface
Simple menus
No extra screen reader
Krajnc E., Feiner J., Schmidt S.

6. Prototyping
Review with
experts
Iteration of the UI design
Krajnc E., Feiner J., Schmidt S.

7. Implementation of the application
Java ME platform
Screen reader Talks
First Results and problems
Wrong UI components
Not everything is read by a
screen reader
Krajnc E., Feiner J., Schmidt S.

8. Usability Engineering
Expert reviews
Usability testing
Krajnc E., Feiner J., Schmidt S.

9. Refactoring of the UI
Simplify the user input
Every text information
has to be readable
Using High Level API
Elements
Krajnc E., Feiner J., Schmidt S.

10. Outlook
SW Development is in progress
New features
Integration UI
More reviews and tests
Converting to other platforms like Android
Krajnc E., Feiner J., Schmidt S.

11. Conclusion
Developing for special user groups is
challenging
Know your user
Use iterative interaction design to
build a better mobile application
Krajnc E., Feiner J., Schmidt S.

12. Thanks for your Attention
Elmar Krajnc
elmar.krajnc@fh-joanneum.at
Johannes Feiner
johannes.feiner@fh-joanneum.at
Stefan Schmidt
stefan.schmidt.ITM07@fh-joanneum.at
FH JOANNEUM
University of Applied Sciences
www.fh-joanneum.at/itm
Krajnc E., Feiner J., Schmidt S.