1CS160 Discussion SectionMatthew KamFeb 3, 2003Goals as TA• Survey responses (25 respondents; ~50% response rate)– Discussion sections• Help students with homework (12)• Prepare students for examinations (11)• Highlight key points of class readings (10) • Live demonstrations (8)• Motivation for HCI techniques (5)• More open discussions, less lecturing (4)• Supplement and cover “wet” side of lecture material (3)– Office Hours• Coaching with projects; correct applications (11)– General• Inspire interest in subject (2)• Make learning fun and interesting (2)Goals as TA• Additional feedback– “Discussions! For evaluation of student idea”– “I like your slides and outside references”– Critiques / analysis in live demonstrationsGoals as TA• Methodology flaws– Ambiguous instructions -> ambiguous responses• Some responses were ranked– Survey “questions” not clearly organized• E.g.:“Coaching with projects” should be omitted• Real-world exceptions– “Prep for exam/hw”– “Open discussion (relevant to lecture, exams, hw)”– “Coaching w/ projects (that inspires interest in it)”TA Office Hours• M 4:30-5:30, Th 10-11; 551 Soda (note change!)• Office: 417 Soda • Email [email protected] appointments at other times, and course-related matters• Include “CS160” in subject header• If urgent, mark “high priority”• Discussion sections homepage:http://www.cs.berkeley.edu/~mattkam/cs160/• Newsgroup: ucb.class.cs160Teaching HCI Using HCI• Collaborative tools–Email– Newsgroup– World Wide Web–Swiki– Livenotes• Demo by designing discussion sections iteratively– Personas– Making connections• Practical exposure to HCI research– Experiments and user studies– Drawing from own research experience2Concepts• History of HCI postponed• Ubiquitous computing• Context- / location- awareness• Human-centered design• Personas• Value-sensitive designUbiquitous Computing• People and environments integrated seamlessly with computationally-enabled everyday objects that provide services when and where desired. • “The most profound technologies are those that disappear. They weave themselves into the fabric of everyday life until they are indistinguishable from it.”– E.g.: writing and print technology• Tabs, pads and boards• Active Badge and RFIDs• Wireless network infrastructure (e.g. Wi-Fi, Bluetooth)Mark Weiser. The Computer for the 21stCentury.In Scientific American, September 1991.Context-/Location- Awareness• What is context?– Available information about and in the environment that can be sensed by computer• Who are present?• What are the occupants doing?• Where is he heading towards?• When was he in this room?• Why is he doing this? (very challenging problem)• Location-awareness is subset of context-awareness• Context-awareness is a feature that many ubicomp applications will needGregory D. Abowd and Elizabeth D. Mynatt. Charting Past, Present, and Future Research in Ubiquitous Computing. In ACM Transactions on Computer-Human Interaction, Vol. 7, No. 1, March 2000.Ubicomp Meets Context-AwarenessMicrosoft’s Smart Personal Object Technology (SPOT)http://www.microsoft.com/presspass/features/2003/jan03/01-09SPOTWatches.aspHuman-Centered Design• Who is going to use the system?• What are their characteristics, goals and desires?• Choose representative tasks and analyze them• Rough out a design (plagiarize as needed)• Rethink the design• Create a prototype• Test it with users• Iterate• Build a production version (and ship it!)• Track use• Evolve the designSlide adapted from Prof. John CannyHuman-Centered Design• User conceptual model is the most important component of a user interface• Should be clear, obvious and substantial• Employs metaphors (e.g. spreadsheets, desktops) to facilitate learning• Dissonance in models (GUI as skin for Unix)– Noun-verb interface• Developers got upset when real users encountered trouble with prototype• Caveat: Emphasis on user made Star 1.0 too slow– Underlying technology and its robustness is still important• Design methodology that systematically accounts for users– Videotaping of user studies– Screen views if working prototype doesn’t exist yetLiddle reading.3Human-Centered Design• Features list miss interconnected nature of tasks• Need to look at each element in context• “Submitted for approval,” not to find problems– Linear approach is time-tested to result in complex, messy solutions• Iterative development means rapid prototyping• Technology also important (Mac, Lisa)• Apple marketed for “artsy” types• Network externalities, aka winner-takes-all• Understand the customer!Norman reading.PersonasAlan Cooper and Paul Saffo. The Inmates are Running the Asylum. Simon and Schuster. April 6, 1999. Chapters 9 and 10.Personas• Why use personas?– Avoids the “elastic” user• Programmers bend, stretch and adapt the software for the user, not user bending and adapting to software• Makes it difficult for programmers to distort the users’ goals and needs– Communication within team• End feature debates– Negative personas• Someone you explicitly don’t want to design forPersonas• What are personas?– Hypothetical archetypes of actual users– Defined with rigor and precision– Specific but stereotyped– Although they are imaginary, we discover them in the investigation process, not by making them up– Defined by their goalsPersonas• “The essence of good interaction design is devising interactions that let users achieve their practical goals without violating their personal goals.”• Goals vs. tasks– A goal is an end condition– A task is an intermediate process required to achieve the goal– Tasks change as technology changes, but goals tend to remain stable– Programmers do task-directed designPersonas• What goes into a good persona?– Skill levels– Capabilities, inclinations and background (or lack of)– Other pertinent economic, social, values, etc. characteristics– Precision to extent that persona can stand for member of development team– Goals (most important)• Identify the primary persona– “Someone who must be satisfied, but who cannot be satisfied with an interface designed for any other persona.”4Persona 1• Albert• Age: 20• Computer science major• Introvert, plays computer
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