HCI: evaluation

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Presented to my students on 17 February 2014.


<ul><li> 1. HCI: evaluatie KU Leuven, B, 17 February 2014 !Erik Duval http://erikduval.wordpress.com @ErikDuval1</li></ul> <p> 2. 2http://www.slideshare.net/erik.duval 3. Criteria for evaluation: what do you think? 4. criteria Usefulness Meaning (aesthetic) Qualities Sociability Usability 5. http://semanticstudios.com/publications/semantics/000029.php 6. Usability Learnability: time to learn the application Efciency: time to perform task Memorability: timethat users remember how and what Accuracy: number and kind of errors satisfaction: subjective feeling Often a compromise - important to make explicit 7. tijdens het ontwikkelen om te verbeteren summatief op het einde om te bewijzen dat het (niet) werkt formatief 8. methods !- questionnaire - usability engineering - by experts - usage tracking 9. questionnaireshttp://hcibib.org/perlman/question.html 10. http://www.cc.gatech.edu/gvu/images/lab/usability-lab.jpgUsability Lab 11. Usability engineering Think-aloud protocol Video recording with annotation Log, remarks, etc. for analysis Discount usability engineering Comparative test of user interface 12. By experts in HCI or domain very effective delicate relation with developers target identify problems suggest solutions through checklist of guidelines 13. User tracking google analytics attention metadata 14. Participants representative computer experience, language, task, motivation, education, etc. gender, age have to know they are not being evaluated relationship colleagues, friends, family, ... 15. they are ... human beings ! 16. how many?Texthttp://www.useit.com/alertbox/20000319.htmlhttp://www.useit.com/alertbox/20000319.html 17. every test user nds fraction L of usability issues independent test users n n users nd fraction 1-(1-L) L=31% L=8%85% for n=5, 99% for n=15 35% for n=5 18. Factors that inuence usability: what do you think? 19. Factoren: Cognitief cognitive fatigue, boredom, stress, fear, ... personality gender (abort) cultural i18n 20. Trash can in Thailand 21. ? @ErikDuval http://erikduval.wordpress.com 22 </p>


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