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Customer interface class lectures_55829744-Human-Computer-Interface-Unit-8

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HUMAN COMPUTER INTERACTION B.TECH III YR II SEMESTER (TERM 08-09) UNIT 8 PPT SLIDES TEXT BOOKS: The essential guide to user interface design, Wilbert O Galitz, Wiley DreamaTech. Designing the user interface. 3rd Edition Ben Shneidermann , Pearson Education Asia. No. of slides: 36 UNIT-8 INDEX UNIT 8 PPT SLIDES S.NO. 1. 2. TOPIC LECTURE NO. Interaction Devices Keyboard Layouts Pointing Devices L56 L56.1 to L56.5 L57 L57.1 to L57.5 L58 L59 L58.1 to L58.5 L59.1 to L59.3 3. Novel devices L60 4. Speech and auditory interfaces L61 5. Displays – Small and Large L62 6. Mobile device displays L63 7. Printers L64 8. REVISION L65 UNIT-8 PPTSLIDES L60.1 to L60.1 L61.1 to L61.6 L62.1 to L62.6 L63.1 to L63.2 L64.1 to L64.2 Interaction Devices UNIT-8 Keyboard Layouts • QWERTY layout – 1870 Christopher Latham Sholes – good mechanical design and a clever placement of the letters that slowed down the users enough that key jamming was infrequent – put frequently used letter pairs far apart, thereby increasing finger travel distances • Dvorak layout – 1920 – reduces finger travel distances by at least one order of magnitude – Acceptance has been slow despite the dedicated efforts of some devotees – it takes about 1 week of regular typing to make the switch, but most users have been unwilling to invest the effort UNIT-8 Keyboard Layouts (cont.) • ABCDE style – 26 letters of the alphabet laid out in alphabetical order nontypists will find it easier ...
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