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HCI revision lecture

HCI revision lecture. Main points. Understanding Applying knowledge Knowing key points Knowing relationship between things If you’ve done the group project work from start to finish then you’re quite well prepared for the exam. Exam format. All four questions 1.5 hours

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HCI revision lecture

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  1. HCI revision lecture

  2. Main points • Understanding • Applying knowledge • Knowing key points • Knowing relationship between things • If you’ve done the group project work from start to finish then you’re quite well prepared for the exam

  3. Exam format • All four questions • 1.5 hours • Mixture of structured questions and essay-style answers • 100% in 90 mins • Spend 54 secs per % • Gives guidance as to how much I expect in an answer

  4. User-centered design • Definition - target audience, user needs etc. • Task analysis - identify user’s goals, tasks, strategies, current tools, problems and thoughts on future • Design • Prototype - create alternative solutions (usually low-fi) • Test - walk-through with users, get feedback, choose design • Redesign • Build - in stages, soliciting user feedback on key issues and problems - iterate the design cycle, evaluating the system in-situ, looking at task working, errors, etc • Acceptance testing, benchmark assessment: run final tests and evaluation to uncover remaining issues. Run benchmarks against competitors to show solution meets objectives

  5. Design Creativity • Understand and be able to use different approaches • Brainstorming • Matrix • Impossible combinations • Future envisaging • Inspiration tray

  6. Personas • What are they? • What are they used for? • Design guidance • Communication • Characteristics • Overview, day in life, work, leisure, goals, skills, impact, demography, technological awareness, communications, international,quotes, references

  7. Ethnography • What is it? • What does it give you? • What tools does it use? • E.g. cultural probes

  8. Questionnaires • What are they used for? • What are the main points to consider in the design? • Objectives, sampling, writing, administering, interpreting • How to write questionnaire • Subjective vs objective, qualitative vs quantitative

  9. How to ask questions • Open vs closed • Clarity • Leading questions • Ambiguity • Multiple part questions • Embarrasing questions • Hypothetical questions • Prestige bias • Dealing with “don’t know”

  10. Prototyping • Approaches • Low-fi • Paper sketches • Post-its • Med-fi • Powerpoint • Web pages • Screenshots • Hi-fi • Reduced functionality systems • Animation systems

  11. Prototyping: why? • Easy and fast to do • Focuses on the critical elements • Allows high-level concepts to be quickly explored • Easy for designers and users to modify • Rapid iteration • Focus for discussion • Cheap

  12. Guidelines • Why have them? • What are some typical ones? • With examples • Web and interface

  13. Evaluation • Think-aloud • user-driven usage, verbally identifying usability or confusion problems through actions • Cooperative evaluation • User and designer discussing issues, answering questions, exploring interface • Heuristic evaluation • basic guidelines plus domain-specific ones, expert eval to see if site conforms or does not. • And heuristics….. • Cognitive walkthrough • detailed set of actions and screens from programmers, expert assessment to see if actions obvious, visible, and achievable • Expect to identify usability problems, comprehension issues, confusions, possibly speed/performance issues

  14. Other issues covered • Your project • Know what you did, why, how you worked with users, what impact that had • UCD in practice • Ethics • What are ethical considerations, examples

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