1. 1 Lecture 2: Discovering what people can't tell you: Contextual Inquiry and Design Methodology* Brad Myers 05-863 / 08-763 / 46-863: Introduction to Human Computer Interaction for Technology Executives Fall, 2009, Mini 2 *These lecture notes based in part on notes created by Professors Bonnie John and Ken Koedinger

2. 2 Enrollment as of Saturday = 66

3. 3 Teaching Assistants Andrea Irwin airwin @ andrew.cmu.edu http://andreairwindesign.com/ Office hours: Wed, 12:30pm-1:30pm, place: NSH 3501 By appointment Zhiquan ("ZQ") Yeo zyeo @ andrew.cmu.edu http://www.zhiquanyeo.com/ Office hours: Sun, 7:00pm-8:00pm, place: NSH 3001 By appointment

4. 4 Pick Devices for Assignments Random order for currently enrolled & wait-listed students If late to class, go to end of the line

5. 5 Some Usability Methods Contextual Inquiry Contextual Design Paper prototypes Think-aloud protocols Heuristic Evaluation Cognitive Walkthrough KLM and GOMS Task analysis Questionnaires Surveys Interaction Relabeling Personas Log analysis Focus groups Video prototyping Wizard of Oz Body storming Affinity diagrams Expert interviews Card sorting Diary studies Improvisation Use cases Scenarios Cognitive Dimensions …

6. 6 Contextual Inquiry and Design One method for organizing the development process We teach it to our MS and BS students Seems to be very successful Described in book: H. Beyer and K. Holtzblatt. 1998. Contextual Design: Defining Customer-Centered Systems. San Francisco, CA:Morgan Kaufmann Publishers, Inc. ISBN: 1558604111.Contextual Design: Defining Customer-Centered Systems http://www.incent.com/ Another book (doesn’t work as well): K. Holtblatt, J. BurnsWendell, and S. Wood. 2004. Rapid Contextual Design: A How-to Guide to Key Techniques for User- Centered Design. San Francisco, CA:Morgan Kaufmann Publishers, Inc.Rapid Contextual Design: A How-to Guide to Key Techniques for User- Centered Design

7. 7 Common HCI methods in the software lifecycle System Formulation Requirements Architectural Design Detailed Design e.g. MHP, GOMS, Heuristic Evaluation, Cognitive Walkthrough, Rapid prototyping + Think-aloud testing, Controlled experiments. Implementation System Test and Deployment e.g., Think-aloud Usability Testing, Log analysis, Contextual Inquiry, Controlled Experiments e.g., interviews, questionnaires, Contextual Inquiry

8. 8 Contextual Inquiry Design Ideas New Design Ideas Think-Aloud Usability Studies Heuristic Evaluation Cognitive Walkthrough Prototyping GOMS Tasks Analytic Methods Empirical Methods HCI methods in the design process Contextual Inquiry is used in the beginning of the design process Contextual Inquiry is used in the beginning of the design process

9. 9 User Study Methods & the different fields they come from Questionnaires, Interviews Social Psychology Focus Groups Business, marketing technique Laboratory studies Experimental Psychology Think-aloud protocols Cognitive Psychology Participant/observer ethnographic studies Anthropology

10. 10 Contextual Inquiry & Design Contextual Inquiry An evolving method A kind of “ethnographic” or “participatory design” method Combines aspects of other methods: Interviewing, think-aloud protocols, participant/observer in the context of the work Part of “Contextual Design” Also includes models to describe results

11. 11 “Contextual Inquiry” Interpretive field research method Depends on conversations with users in the context of their work Recommends “direct observation” when possible When not possible cued recall of past experience, or recreation of related experience Used to define requirements, plans and designs. Drives the creative process: In original design In considering new features or functionality

12. 12 Why Context? Design complete work process Fits into “fabric” of entire operations Not just “point solutions” to specific problems Integration! Consistency, effectiveness, efficiency, coherent Design from data Not just opinions, negotiation Not just a list of features

13. 13 Who? Interviewers: “Cross-functional” team Designers UI specialists Product managers Marketing Technical people Customers Between 6 – 20 Representative of different roles

14. 14 Where? Design is a group activity Shared across different groups Useful to have a designated, long-term space for the project team Interviews at customer site

15. 15 Key Concepts in Contextual Inquiry Context Understand users' needs in their work or living environment Partnership Work with users as co-investigators Interpretation Assigning meaning to the observations Focus Listen and probe from a clearly defined set of concerns

16. 16 Context Definition: The interrelated conditions within which something occurs or exists Understand work in its natural environment Go to the user Observe real work Use real examples and artifacts “Artifact”: An object created by human workmanship Interview while she/he is working

17. 17 Key distinctions about context Interviews, Surveys, Focus Groups Summary data & abstractions Subjective Limited by reliability of human memory What customers think & say they want Contextual Inquiry Ongoing experience & concrete data Objective Spontaneous, as it happens What customers actually need

18. 18 Elements of User's Context: Pay Attention to all of these User's work space User's work User's work intentions User's words Tools used How people work together Business goals Organizational and cultural structure

19. 19 Standard Contextual Inquiry: Work-based Interview Use when: Product or process already exists Or a near competitor’s User is able to complete a task while you observe Work can be interrupted

20. 20 What to Record Work flow and tasks Work opportunities and problems Tool opportunities and problems Design ideas and validations User's words Ask for elaboration, explanation Your observations

21. 21 Interview Note-Taking When to take notes? Any observations not being recorded Note taking can help you pay closer attention Notes lead to faster turn-around Do not let it interfere with interviewing How to record? What the user says – in quotes What the user does – plain text Your interpretation – in parentheses Write fast!

22. 22 Reasons for variation on the standard work-based interview Different goals Designing a known product Know the competition Addressing a new work domain Study what replacing Designing for a new technology Types of tasks that make work-based inquiry impractical Intermittent – instrument or keep logs Uninterruptible – video and review later Extremely long – point sample and review

23. 23 Some Alternative Contextual Inquiry Interview Methods For intermittent tasks In-context cued recall Activity logs For uninterruptible tasks Post-observation inquiry For extremely long or multi-person tasks Artifact walkthrough New technology within current work Future Scenario Prototype or prior version exists Prototype/Test drive

24. 24 Partnership Definition: A relationship characterized by close cooperation Build an equitable relationship with the user Suspend your assumptions and beliefs Invite the user into the inquiry process

25. 25 Why is Partnership Important? Information is obtained through a dialog The user is the expert. Not a conventional interview Alternative way to view the relationship: Master/Apprentice The user is the “master craftsman” at his/her work You are the apprentice trying to learn

26. 26 Establishing Partnership Share control Use open-ended questions that invite users to talk: "What are you doing?" "Is that what you expect?" "Why are you doing...?" Let the user lead the conversation Listen! Pay attention to communication that is non-verbal

27. 27 Making your interpretations explicit Procedure we recommend (not in Beyer & Holtzblatt’s writings) Label “facts” with the line number of the transcript or time on the tape Interpretations are then anything not labeled that way If you do this all the way through, the links back to facts are explicit and the intermediate hypotheses and ideas can always be challenged

28. 28 Analysis In the moment: Simultaneous data collection and analysis during interview Post interview: Using notes, tapes, and transcripts Analysis by a group: Integrates multiple perspectives Creates shared vision Creates shared focus Builds teams Saves time

29. 29 Defining the Tasks In a real Contextual Inquiry, user decides the tasks Investigate real-world tasks, needs, context But you still must decide the focus What tasks you want to observe That are relevant to your product plan But for Assignment 1, you will have to invent some tasks

30. 30 Test Tasks Task design is difficult part of usability testing Representative of “real” tasks Sufficiently realistic and compelling so users are motivated to finish Can let users create their own tasks if relevant Appropriate difficulty and coverage Should last about 2 minutes for expert, less than 30 for novice Short enough to be finished, but not trivial Tasks not humorous, frivolous, or offensive Easy task first, progressively harder But better if independent

31. 31 Test Script Useful to have a script Make sure say everything you want Make sure all users get same instructions Should read instructions out loud Ask if users have any questions Make sure instructions provide goals only in a general way, and doesn’t give away information Describe the result and not the steps Avoid product names and technical terms that appear on the web site Don’t give away the vocabulary Example: “The clock should have the right time”; not: “Use the hours and minutes buttons to set the time”

32. 32 Example of CI Video of sample session with a eCommerce site: http://www.cs.cmu.edu/~bam/uicourse/EHCIcontexualinquiry.mpg Issues to observe Interview of work in progress, in “context” Actual session of doing a task Not an interview asking about possible tasks, etc. Questions to clarify about routine, motivations Why do certain actions: need intent for actions Notice problems (“breakdowns”) Notice what happens that causes users to do something (“triggers”) E.g. appearance of error messages, other feedback, external events (phone ringing), etc.

33. 33 Screen shots of important points in video http://www.cs.cmu.edu/~bam/uicourse/EHCIcontexualinquiryScreens.ppt