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- 2. • The best way to reach me is through e-mail: Gulmina.rextina@comsats.edu.pk
- 3. Why HCI? • HCI stands for Human Computer Interaction…. • So what are we trying to achieve by studying this course. “If we design and develop digital products in such a way that the people who use them can easily achieve their goals, they will be satisfied, effective, and happy.” That seems simple enough … yet many products are frustrating to use.
- 4. Why HCI? • Can you think of any products that you have used and you had a problem using them? • It doesn’t only have to be software.
- 5. • What about the vending machine downstairs? Was it easy to use when you used it for the first time? • Also think about a product that is pleasant to use or that does not require an thought • A sign of good design is that you don’t notice them • Its when design fails it is very obvious.
- 6. Why HCI? • What about other every day products? • Have you ever pulled a door when it was supposed to be pulled? • Think about your mobiles, TV, fridge.
- 7. Why do so many products fail? • The main reason is the absence of design. • What is design? ❖Understanding the desires, needs, motivations, and contexts of people using products ❖Understanding business, technical, and domain opportunities, requirements, and constraints ❖Using this knowledge as a foundation for plans to create products whose form, content, and behavior are useful, usable, and desirable, as well as economically viable and technically feasible
- 8. Why digital products fail? • Four main reasons • Misplaces Priorities– on the part of both management and developers • Ignorance about real users • Conflicts of interest • Lack of design process
- 9. Misplaces Priorities • Marketers • Chasing competition • Making guesses based on surveys • Developers • Have a lot of say regarding what actually gets built. • Have tight deadlines and confusing input about what needs to be built
- 10. Ignorance about real users • Who will use the product? • Why would they want to use it? • How will they use it? • What are there goals?
- 11. Conflict of Interest • Developers should not be designers. • Why?
- 12. Lack of Design Process • Processes exist but may not be followed • Many companies integrate user input directly into the development… • but users can only identify problems but often can not specify the solution
- 13. Context of HCI • Where can we apply HCI? • Anything with an interface
- 14. Context of HCI • That includes • Websites • Desk top applications • Mobile apps • Coffee machines • Vending machines • Software in an airplane • … • … • .. • .
- 15. Good Or Bad Interface?? 15 © Interface Hall of Shame
- 16. Good or Bad Interface? 16
- 17. Why is Good Interaction Design Important? 17 • Users time isn’t getting any cheaper • A company may save lots of money by reducing the time it takes it workers to do a task • Few attempts to use any product • If not successful • Loses hope • Gives up • Disasters can occur • Examples • Three Mile Island • Air Inter Flight 148,
- 18. Three Mile Island 1979, Pensulvania
- 19. Air Inter Flight 148 19 http://blog.martindoms.com/2011/01/24/poor-ui-design-can-kill/
- 20. Why are User Interfaces Hard to Design 20 • You are not the user • It is very hard for designers to put themselves in place of the user to understand how they will perceive things • Users are right • If people keep making the same mistakes with your design it’s the fault of the design not the users • But users are not designers • They don’t always know what they want • 1950’s telephone study • Google results per page • 10, 20 or 30 results per page
- 21. So What is Usability 21 • Dimensions of Usability • Learnability • Efficiency • Visibility • Errors • Satisfaction • All of these are measurable, just as we can say that Algorithm X is more efficient then Algorithm Y we can say Interface X is more Learnable than interface Y • What about when all the requirements haven’t been meet? • Or if a system crashes?
- 22. Which Dimension of Usability is more Important? 22 • …. Depends on the user • New users would need learnability more • Experts need efficiency • Infrequent users need memorability • But no user is completely novice or expert
- 23. Why Study HCI? 23 • To develop products / interaction techniques • Easy to use • Easy to learn • Easy to remember • To design user friendly systems • Efficient • Avoid unnecessary complexity
- 24. What is HCI? 24
- 25. Software Eng. VS HCI 25 SoftwareEngineering • System- centered • Software architecture • procedural aspects HumanComputer Interaction • User- centered • Users • Tasks • Context of use
- 26. Some HCI Subjects 26 • HCI (in general) • Usability eng./testing • User interface design • Human factors/Ergonomics • Web design/usability • Graphic design • Information visualization • Many more…
- 27. What is wrong with the following 27
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- 30. Course Learning Outcomes 30 Upon completion of the course, students will be able to: • Explain context of HCI and different measures for evaluation. • Discuss the physical capabilities, cognitive and social models that inform interaction design. • Apply the principles of good design for people from the perspective of age and disabilities. • Implement techniques for user centered design for a medium sized software. • Evaluate the usability of a medium size software user interface. • Discuss various interaction technologies.