This document discusses usability considerations for mobile devices. It provides recommendations to minimize scrolling, include search options, and provide tactile feedback for long download times. The impact of limited screen size is addressed with suggestions like separating content from markup, using consistent design, limiting unnecessary text, and arranging information by importance. Screen readers and RSS feeds are presented as technologies that can adapt content for mobile. The document also categorizes mobile phones and notes testing showed higher success rates for dedicated mobile sites and apps compared to full websites. It concludes the fat-finger issue will remain for years, emphasizing the need to limit features on mobile.

1. Usability and
Mobile Devices
Prepared by:
Mohammed Fahel
21012195

2. Mobile Usability
• Mobile applications are important for providing users with an
alternate means of accessing your web page, as well as
keeping connected anywhere and at any time.

3. Impact of Low Resolution
recommendations for mobile
interfaces:
• Minimize the amount of scrolling
required to find information
• Include more search options

4. Impact of Download Speed
implementing a tactile feedback
mechanism to notify users if the
task is expected to take more than
four seconds.
The feedback would allow users to
direct their attention back to the
environment rather frequently
checking the screen status. This
should reduce the amount of
needed gazes and increase user
safety.

5. Impact of Limited Screen Size
Horton’s changes include:
• Separate HTML mark-up language
from content information using
CSS
• Use a consistent, uncluttered page
design
• Limit the amount of text used for
non-semantic purposes
• Arrange information in an inverted
pyramid styles (from most to least
important)

6. Screen Readers for Mobile
Devices
• The software converts normal Web pages into a mobile
friendly format. Borodin, et al (2007) described software
(CMo) that analyzes the semantic content of each requested
page and displays it in order of predicted importance to the
user question.
• www. zuznow.com

7. RSS Feeds
• Garofalakis and Stefanis (2007) described a system that takes
advantage of the existing formatting of content into RSS feeds.
The authors used an algorithm that takes content formatted
as RSS and adapts it to the mobile screen.
• Garofalakis and Stefanis asked participants to locate a Web
news article within three minutes and compared their
performance to the existing mobile browser. Results showed
improved success rates on the search task with the new
system as well as positive useful ratings by participants.

8. Mobile Usability Update
three categories of mobile phones:
• Feature phones: primitive handsets with tiny screens and very
limited keypads that are suited mainly for dialing phone
numbers.
• Smartphones: phones with midsized screens and full A–Z
keypads.
• Touch phones: devices with touch-sensitive screens that cover
almost the entire front of the phone.
Mobile User Experience Improving Slowly
• Mobile site success rate: 64%
• Full site success rate: 58%

9. user testing
• design a separate mobile site
• horizontal swiping
• links from the full site to the mobile site
• Apps Beat Sites
• We measured a success rate of 76% when people used
mobile apps, which is much higher than the 64% recorded for
mobile-specific websites.
• The fat-finger syndrome will be with us for years to come.
• limit the number of features

10. Thank you