ITI Human-Computer Interaction 04:574:230

1
ITI Human-Computer Interaction04574230

• Nick Belkin nick_at_belkin.rutgers.edu
• Doug Riecken riecken_at_us.ibm.com

2
Human-Computer Interaction

• Design, Evaluation, and Implementation of
  Interactive Computing Systems for Human Use
• Software Projects 60 failure rate
• Research has shown that HCI matters
• Learning time
• Performance speed
• Error rates
• User satisfaction
• Interface Design Interdisciplinary Effort
• Human Psychology Specialists
• Visual Textual Communication Specialists
• Software Developers
• Marketing Professionals

3
Course Goals

• Understand Basic HCI Concepts
• Lectures, readings, video, hands-on
• Study Design Graphic Interfaces Web Design
  Multimedia Information Visualization
• Study Human Visual Perception
• Software Demos and Evaluations
• Practice User-Centered Design Methods Surveys
  Scenarios Expert Reviews Usability Testing
• Video Analysis of User Interactions
• Rapid Prototyping PowerPoint Dreamwaver
  Java
• Creative Problem Solving in Groups
• Video Analysis of Group Interactions

4
Course Goals

• HCI course will Give You
• Understanding of theory and principles
• Hands-on Experience
• Practical Knowledge
• Marketable Skills

5
Course Requirements

• Text
• Preece, J., Rogers, Y. Sharp, H. (2002)
  Interaction design beyond human-computer
  interaction. New York Wiley.
• Grading
• Individual Exercises 30
• Designed to support term project
• Group Assignments 40
• Term Project 30
• Team project how to form the teams?
• Attendance Just Do It

6
Rules of the Road

• Exercise / Assignment Deadlines
• Submit at start of the class on due date
• No late assignments will be accepted
• Exceptions to Rule
• As defined by official Rutgers policies
• Sharing of Ideas Teamwork
• Share ideas and discuss common problems
• You will work in teams for the Assignments Term
  Project
• You are responsible to your teammates to
  shoulder your fair portion of the work load
• Plagiarism
• Share without engaging in plagiarism
• The Rutgers rules on plagiarism apply
• http//teachx.rutgers.edu/integrity/policy.html

7
HCI Value Proposition

• Software Projects
• 60 failure rate
• 25 never finished
• 35 partial success
• Early user-centered design saves money and time
• Management Support Crucial
• Low Road for Selling Usability
• Reduced development and support costs
• High Road for Selling Usability
• Greater quality and user satisfaction

8
HCI Recognize Diversity

• Usage Profiles
• Novice or first-time users
• Knowledgeable intermittent users
• Expert frequent users
• User Characteristics
• Age, Gender, Physical abilities, Education etc.
• Cultural and International Diversity
• Task Profiles
• Decomposition into multiple middle-level task
  actions, which are refined into atomic actions
• Interaction Styles
• Direct manipulation
• Menu selection
• Form fill-in
• Command language
• Natural language
• ? Blending of interaction styles for diverse
  tasks and diverse users

9
HCI Users Evaluation

• Define Target User Community
• Accommodate Human Diversity no average user
• Evaluation MeasuresTime Speed Errors
  Retention Satisfaction
• Create Test Design Alternatives
• Use a wide range of mock-ups Design ? Test ?
  Design ? Test
• Employ User-Centered Design Methods

10
Three Pillars of Interface Design

• Guidelines Documents and Processes
• Inspired by HCI theories and models
• Provides social process for developers, records
  decisions for all to see, promotes consistency
  and completeness
• User Interface Software Tools
• Based on prototypes
• Expert Reviews and Usability Testing
• Grounded in controlled experiments

11
Logical User-Centered Design Methodology
Developed by Kreitzberg (Cognetics, Princeton
Junction, NJ)

• Stage 1 Develop Product Concept
• Stage 2 Research and Needs Analysis
• Stage 3 Design Concepts Key Screen Prototype
• Stage 4 Iterative Design and Refinement
• Stage 5 Implement Software
• Stage 6 Provide Roll-Out Support

12
User-Centered Design Methods

• Pre-Design
• Ethnographic Observation
• Designing
• Scenario Development
• Participatory Design
• Post-Design
• Expert Reviews
• Heuristic Evaluation
• Guidelines Review
• Consistency Inspection
• Cognitive Walkthrough
• Formal Usability Inspection
• Usability Testing
• Acceptance Testing
• Field Testing

13
Prototyping
14
Product Design User-Centered Methods

• High Concept
• Prototype
• Anticipated Usage Profiles
• Leverage different Interaction Styles
• Software Development
• Internal Testing
• Product Release

• Pre-Design
• Ethnographic Observation
• Designing
• Scenario Development
• Participatory Design
• Post-Design
• Expert Reviews
• Heuristic Evaluation
• Guidelines Review
• Consistency Inspection
• Cognitive Walkthrough
• Formal Usability Inspection
• Usability Testing
• Surveys
• Acceptance Testing
• Field Testing

?
?
15
User-Centered Product Design
16
Creative Problem Solving in Groups

• Content vs. Process
• Study Human Communication
• Intent vs. Effect
• Listening Skills
• Itemized Response
• Address concerns in effective way
• Use Video Analysis