Administrivia

1
(No Transcript)
2
Administrivia

• Review Deliverable 2
• Overview (audience)
• Excellent additions
• User Goals
• Usability Goals
• User Group (who are you designing for?)
• Success Criteria

3
Administrivia

• Review Deliverable 2 (continued)
• Rationale
• Reasoning for problem is separate from reasoning
  for solution
• Principles differ from guidelines
• Dumas Redish (p. 53)
• Principle broad statements (or goals) usually
  based on research about how people learn and work
• Guideline how to achieve specific goals for
  different users, environments and technologies
• Explain how you are applying the principle in
  your solution and support the principle with
  guidelines or findings or study results
• Barnum inspection methods are generally better
  at finding problems than determining the
  appropriate improvement

4
Administrivia

• Review Deliverable 2 (continued)
• Business Case
• Be specific about the return on investment,
  business goals and revenue/cost. What measurable
  difference will it make to the company? For
  example, how do they measure success today and
  how much might that measure be expected to
  improve?
• Too general increase usage, increase users,
  increase sales, improve satisfaction, contain
  expenses, improving usability

5
Project Sharing

• Team discussions
• Share results of heuristic evaluations
• Discuss your choice of methods and results
• Class-level discussion
• Volunteers to share especially challenging or
  surprising insights
• Lessons learned

6
Where are we in the UCD process?
7
Usability Testing

• Test early and often, not just at the end
• Evaluation Technique
• Real users
• Real tasks
• Observe and Record
• Two types
• Discover problems (to improve/form the product)
• Think-a-loud (typical)
• Summarize the usability (measure against goals)
• Usability goals
• Compared to other testing
• Functional Test
• QA Test
• Beta Test

8
Usability Testing

• Preparation
• Choose frequent and critical tasks
• Tasks related to concerns you have
• Develop test script
• Select Participants
• Screening criteria (create gaps to separate)
• Minimum of 3 participants per user group
• 3-5 (Nielsen)
• 8 minimum for a summative test
• Results
• List of problems
• Severity
• Organize Prioritize

9
Usability Testing

• Measurable usability goals
• How many of what type of user will be able to do
  what within what measure?
• 80 of Novice web site users will be able to
  Contact Us in less than 25 seconds.
• What is a reasonable measure?
• Consider how many test participants you have
• How confident do you want to be in the results?
• Bias
• Inappropriate instructions or assistance
• Leading questions
• Subtle feedback (positive or negative)
• Confirming understanding of the task

10
Usability Testing

• Introduction
• What to expect (how long?)
• Work as you would under normal circumstances
• Ethics
• Voluntary (free to stop or leave at any time)
• Permission to record
• An evaluation of the software not of their
  abilities
• Interaction with participants
• Think-aloud
• Handling questions (rhetorical)
• Assistance
• Issues
• How do you know when a task is done?
• Time limit

11
Usability Testing

• Limitations
• Only evaluates part of the interface
• Scripted tasks
• Not a true real-world situation
• May not reveal problems of proficient users
• Even with think-a-loud, intent may not be clear

12
Usability Testing

• Prepare
• Avoid bias
• Introduction
• Develop test script
• Take notes
• Take measures
• Prompt participant (if necessary)

13
Activity Usability Test

• Form Groups
• Individual work choose tasks
• Individual work define measurable goals
• Individual work identify measures
• Group work share and discuss

14
Activity Usability Test

• Discussion Topics
• What are important decisions?
• What types of variations could you imagine?
• What are the complexities what makes it hard?
• What factors are important for achieving success
  with this method?

15
Discussion of Readings

• Facilitate class discussion of topics / ideas /
  themes garnered from the online discussion,
  related to assigned readings.
• Discussion Leaders
• 1. Sarah Sosiak2. Ona Anicello3. Astrid
  Lipke4. Monica Risse

16
Project Exercise Usability Study

• Design and execute a usability study of your
  prototype with 3 users.
• Prepare a one page description summarizing
• Method for testing
• Results of the study
• Potential implications for redesign
• Bring copies of the exercise to class (one copy
  for each member of the team, one copy for the
  instructor) and also post it to your design
  portfolio.
• Due next Thursday

17
Looking back / Looking ahead

• Where weve been
• Topics Readings and discussion
• What is UCD?
• Collecting and summarizing info about users,
  tasks and context
• Problem definition
• Design
• Project
• Insights about users, tasks, and contextual
  issues
• Actual data from observing real users
• Problem definition
• Proposal
• Design

• Where were going
• Redesign
• Represent design
• Support and justify
• Readings
• Cost-justifying usability
• Justifying user visits
• Benefits
• Upcoming Exercises
• Final Design Solution
• Issue Statement A reminder
• 1. Jaana Linsenmayer2. Kris Anderson3. Carol
  Taylor