Full summary of the course Mobile Interaction (master Business Informatics or related masters). It contains 1) summaries for each of the lecture slides (1-10), 2) "Key Points" section as TLDR for the whole summary, 3) very short summaries for each of the mandatory reading papers. The summary should...
Mobile =
● Technological perspective = portable (vague)
● Body-centric perspective = input/output performed relative to body
Mobile computing = human-computer interaction by which a computer is expected to be
transported during normal usage, which allows for transmission of many different live data feeds
Stages
1. Mainframes → One computer used by many
2. Personal computing → One computer used by one
3. Mobile computing → Many devices used by one
The 7 waves of mobile computing
1. Portability
2. Miniaturization
3. Connectivity
4. Convergence = many features in one devices
a. Example application: using mobile phone as camera has many uses including
note-taking, scanning, augmented reality, etc.
5. Divergence = specialized devices (that are really good at doing one thing)
a. For example: MP3-player
6. Apps
7. Digital ecosystems = i.e. “The Internet of Things”, fully interactive ecosystems for
devices
Wearable computers = miniature electronic devices that are worn under, with or on top of
clothing
Mobile interaction = study of interaction between mobile users and computers; it is an aspect
of human-computer interaction that emerged when computers became small enough to enable
mobile usages (90s).
Mobile interaction design = area of interaction design concerned with the creation of user
experiences with interactive products, devices, systems, and services that are mobile (people
can take with them)
● Concerned with the totality of mobile interaction design
● Observations
○ Screens are getting smaller
○ They are getting closer
, ○ Used in different locations and contexts
Mobile devices context factors
● Physical environment
○ Location
○ Infrastructure
○ Physical conditions
● Human factors
○ Information about user
○ Social environment
○ User’s tasks
Challenges
● In systems development and design = creating fit between systems and context
● In usability evaluation = understand system role in its scope
● In implementation = capturing, formalizing and modeling this attribute in computational
data models and using those models
● In user experience research = understand what impact rich and dynamic user contexts
have using the technology
➤ Lecture Enabling technologies
Screens
● Based on the size of the screen and viewing distance, you can determine to what degree
a certain resolution is noticeable.
● Resolution
○
○ dp = sqrt(hp^2 + vp^2)
○ ppi = dp / di
● Retina display = according to Apple, a higher resolution than Retina would not be
noticeable at the expected distance of use
● Human FoV: 120 degrees
● Human FoV focused: 60 degrees
, ● Still active field of research
● Conclusions
○ Technological advancements
○ Human cognitive abilities better than expected
○ Good interface design helps
○ Interaction remains a problem
Sensors
● Humans experience the world via senses. Sensors can help make mobile usage
experience more interactive.
● Mapping
○ Vision/Sight → Camera/Screen
○ Hearing/Sound → Microphone/Speakers
○ Smell → None (but possible / might be useful for AR/VR)
■ Usage unclear yet
○ Taste → None
○ Touch → Screens (Touch) / Vibration
■ Vibration used for Notification, Response
■ Issues: battery life, annoying, inappropriate
○ Proprioception (sense of relative position) → Magnetometer/compass, GPS,
Accelerometer/gyroscope
■ Accelerometer = measures acceleration relative to gravity; device
orientation relative to earth
■ Examples of interaction with tilting: Menu selection, Pie menu selection,
Map browser, Scrolling by tilting
, ■ Gyroscope = measures rate of rotation around axis; more accurate than
accelerometer, but drift over time
■ Magnetometer = compass i.e. measures strength and direction of earth
magnetic field
■ Absolute location = location in the world (GPS)
■ Relative location = location with respect to user
■ Orientation of device relative to world by magnetometer
■ Orientation of device relative to itself by accelerometer and gyroscope
Takeaways
● Technological advancements to cope with many issues
● They will not be able to resolve interaction issues
● But can be used for better interaction designs
➤ Lecture Touch-based interaction
Command Line Interface (CLI) = terminals and keyboards
Graphical User Interface (GUI) = keyboard, mouse, etc
● Indirect = input and output space separated (mouse, keyboard, screen)
● Direct = touch screen for example
Direct manipulation interface = allows user to directly act on a set of objects in the interface
(used to be used to distinguish GUI and CLI interfaces)
Gorilla arm = fatigue in arms when using touch-screens on PCs and other non-mobile devices
Touch-based screens revival due to popularity in mobile devices.
Touch-screens in mobile phones
● Advantages
○ Portable, easy to hold
○ Direct manipulation
○ No gorilla arm because of small form factor
○ No need for external hardware
○ Maximizes screen real estate
○ Multi-touch
● Disadvantages
○ Keyboard (size and haptic feedback)
Touch screen types
● Capacitive = layer of conductive material holding charge (only fingers)
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller gerwinvanderlugt. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.48. You're not tied to anything after your purchase.
