, VL01 Basics of Human-Computer Interaction
↳ Determines how humans use computer system s
↳ H21 is the central Discipline in how we feel and what we experience while
interacting with digital technologies
Why is Usability important?
↳ improving it can:increase productivity, reduce costs, increase sales, enhance customer loyalty, win new customers
The Value of Products
↳
product discrimination is done by price & Functionality/Features
4 if price similar: -> Usabilityfactor important
Why Focus on User and Interaction?
↳ interested
Majority of users are not in technology
↳ New Question:What can humans do with computers?
Economic Dimensions of Usability
↳ UI often the central discrimination factor
is
↳ same product/service is sold at very similar prices
↳ possible
Competition is very close and comparison is easily
Summary
↳ Interface and
and interaction design defines how we can use devices, services applications
↳ Interface
d Interaction design impacts user performance
the way
↳
Important to understand whypeople use a
system as a tool to achieve their goals
↳
AC1 is relevant, as it becomes harder to differenciate products based on features
↳
Good usability is important
economically
↳ & discussing design & trade-offs
Sketching UI options is important
↳ Innovation ACI visible
in is mostly
Terms & Definitions
->
Human-Computer Interaction
↳ research in the focuses between people and computers.
design and the use of computer technology, which on the interface
H21 researchers observe the ways humans interact with computers and
design technologies that allow humans to interactwith computers
in novel ways. A
device that allows interaction between human being and a computer is known as AC1.
Interactive Systems
↳ to interact real-time
computational system that allows users in
↳ Interactive devices, etc.)
Computing (less focus on system Aspect:GUI, Mobile
The User Interface
↳ part both
ofthe system, the user interacts with ->
supports input, output or
User ->
Person, which interacts with a system, product or service
Context of Use - combination of users, goals, tasks, resources and environment
Interactive System - combination of hardware, software, services, people that users interact with to achieve specificgoals
User Interface ->
all components of an interactive system that provide inform, d controls for the user to accomplish tasks
Usability -> extent to which a system, product or service can be used with effectiveness, efficiency & satisfaction
User Experience perception & that from of
->
-
User's responses result the use a
system, product or service
Human-Centred Design approach that human factorsergonomics
to make interactive
knowledge
->
aims systems more usable, applying and usab. (ity
Rachid
Yagubi
,Utility ->
product can be used to reach a certain goal or to perform a certain task
Usability relates to the question of quality and efficiency /qualityattribute that assesses how UIs to use
-
easy are
Likeability -> may be related to utilityand usability
Affordance ->
what the system offers to an individual with respect to its stimily
Term Affordance
↳ determine what actions are
possible
↳ where the action should take place
signifiers communicate
false affordance ->
apparent affordance that does not have any real function
hidden affordance ->
possibilities for action, but these are not perceived
perceptible affordance ->
inform, available such that the actor perceives and can then act upon the existing affordance
Usabilityhas 5
qualitycomponents
↳> the firstencounter?
Learnability ->
How easyis it to accomplish basic tasks on
↳ Efficiency- once learned, how quickly can the task be performed?
↳
Memorability -> after time -> how long does take to
it reestablish proficiency?
↳Errors ->
How manyerrers do users make
↳ satisfaction ->
How pleasant is itto use the design?
Interaction Design vs. User Experience Design
↳ Interaction Design (IXD):Design of interactive products & services which focuses on the users will interact with it
way
↳ User
Experience Design (UxD): Designing the experience a user will encounter. Consider UI
Design in a broader context of usel
↳ User Interface
Design (UID):Conception & Design of the UI,
including modalities, interface elements and their placement
5 Dimensions Interaction
of
Design
↳ 1-D: Words:words & poetry
↳ 2-D:Visual representations: painting, typography, diagrams, icons-> Interaction Design can borrow from those languages
↳ 3-D:physical objects:physical, sculptural form ...
e.g. if ith. has a handle, we know what to do
↳ 4-D: Time sound, film & animation
↳ b-D:behavior: mechanism of a product. How do users perform actions?
Allgegenwärtiges
Ubiquitous Computing (2)
↳ seamless integration of self-communicating small scale computers into the user environment
↳ lot ->
physical Objects with sensors, processing ability, software d other technologies communicate over Internet
, VLO2
End Users vs. Developer
↳
Developer know everything about their development
↳ End users little idea about everything & do not care about it
What is the Users' Task?
↳ The users' path to solve the problem- task flow (composed of one or more tasks)
Tools to solve Problems
↳The
right tool influences Evolution
Creating Interactive Systems
↳ Creating UI at the end of will not work
the project
↳ A has to be considered from the very
beginning
Xerox
PARL
and entrepeneurs (Stere])
↳
Birthplace the printer, ethernet, many
of
programming Languages, Gul
User-Illusion and Metaphors
↳ At PARC the illusion has been coined
phrase user
↳ clear connotations to stage, theatrics & magic-direction becomes clear
Magic & User Illusion
↳ Describes the perfect magical experience or the optimal illusion
↳ show the screen as Paper to be marked on
for Users
Designing
↳ system designed for people should be to
easy learn, useful, contain functions people need,
easy and pleasant to use
↳ Three of Focus Users and Tasks
principles system Design: -
Early on
->
Empirical Measurement
->
Iterative Design
Designing Computers for Users / Key Principles for Usability
↳ we must understand computers ->
limitations, capacities, tools, platforms
↳ must understand
we people ->
psychological, social aspects, human error
↳> Interaction between Computer dusers too complex-> Design process needed
↳ Requirements:who wants what and why?
↳ Analysis:results of observations and interviews
↳
Design:Art design guidelines and principles
↳
Evaluation:design never work the first time
↳
Implementation and release:everyone is satisfied
