The goal of HCI Interaction Design

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The goal of HCI (Interaction Design)

• The goal of HCI is to bring usability into the
  design process.
• Developing interactive products that are easy,
  effective, and enjoyable to use from a users
  perspective!

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Interface Examples
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How do we design a usable interface?

• Compare good and bad examples
• Ask some simple questions
• Who is going to use the interface and where?
• What kinds of activities need to be supported?
• What kind of interface will be needed?
• What kind of interaction will be needed?
• Use the above to design the interface to optimize
  the users interaction with the system

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How do we design to optimize the users
interaction with the system?

• Take into account what people are good and bad at
• Find out what may help people with the way they
  currently do things
• Find out what might provide a quality experience
• Listen to what people want and get them involved
  in the design
• Use tried tested user-based techniques in the
  design process
• The goal of HCI is to cover these topics to learn
  how to carry out and evaluate interaction
  design
• a.k.a. -gtHow to make usable, useful, enjoyable
  systems! ?

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What is HCI (Interaction Design)

• Interaction Design is all about people and how to
  best accommodate their needs.
• Traditionally, Computer Science did not study
  humans.
• Who can help us?
• Psychology (cognitive)
• Sociology
• Anthropology
• Communications
• Education
• Multimedia/Graphic Design
• Art, Animation, Photography
• Many others

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Roots of HCI

• Early on, computers were designed for engineers
  by engineers
• Late 70s, use of monitors and personal computers
  made computer interfaces an issue. Computer
  scientists began working with Psychologists in
  designing interfaces.
• Mid-80s, GUI design. New interfaces including
  speech recognition, multimedia, information
  visualization, and virtual reality required other
  fields to help with design.
• Education and Training software was also popular
  in the mid-80s with interactive learning
  environments, educational software, and training
  simulators. (educators and training experts)
• 90s Networking, mobile computing, web.
  Computers began to invade all aspects of life.
  (media design, sociology, anthropology)
• 00s Radio frequency tags, large interactive
  screens, information appliances, embedded PCs
  (need those engineers again!)
• Designing from a human-centered perspective
  requires a multidisciplinary team

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The reality of HCI

• Interaction Design in Business ? Got HCI?
• A poor design can hurt a product and the company
• A poor design can cause an emerging technology to
  fail
• Many companies hire user-centered design
  consultants
• http//www.hcibib.org
• Jobs
• Interface designer
• Interactive/interaction designer
• Usability engineer
• Web designer
• Information Architect
• User-experience designer
• HCI is a good subject for anyone interested in
  people and computers

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What is involved with interaction design?

• Identify needs and establish requirements
• Develop designs that meet those requirements
• Build interactive versions of the design so that
  the design can be communicated and assessed
• Evaluate what is being built throughout the
  process
• Observation
• Interviews
• Usability tests
• Questionnaires

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Key Characteristics of this Process

• Users should be involved throughout development
• Specific usability and user experience goals
  should be identified, clearly documented, and
  agreed upon at the beginning of the project
• Iteration is inevitable
• Usability Goals Goals concerned with meeting
  specific usability criteria
• User-experience goals Goals concerned with the
  quality of the experience

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Usability Goals

• Effective to use
• Efficient to Use
• Safe to Use
• Have Good Utility
• Easy to Learn
• Easy to Remember How to Use

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User-Experience Goals

• Satisfying
• Enjoyable
• Fun
• Entertaining
• Helpful
• Motivating
• Aesthetically Pleasing
• Supportive of Creativity
• Rewarding
• Emotionally Fulfilling
• Not all of the usability/user-experience goals
  are applicable to every product

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Design and Usability Principles

• Design Principles are generalized concepts used
  to help designers to think about different
  aspects of their design Visibility, Feedback,
  Constraints, Affordance,
• Mapping, Consitancy, Conceptual Models
• Usability Principles are more specific than
  design principles. They are used to prescribe
  and evaluate design

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Nielsens Usability Principles (2001)

• Visibility of System Status
• Match between system and real world
• User control and freedom
• Consistency and Standards
• Help users recognize, diagnose, and recover from
  error
• Error prevention
• Recognition rather than recall
• Flexibility and Efficiency of use
• Aesthetic and minimalist design
• Help and Documentation