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PDA Usability

PDA Usability. Vidya Narayan The University of Texas at Austin School of Information LIS 382L.15. PDAs. Ubiquitous ? Going beyond just a Personal Digital Assistant Various new and novel applications Data collection GPS Survey tools. Displaying Text in PDAs. PDA have small screens

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PDA Usability

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  1. PDA Usability Vidya Narayan The University of Texas at Austin School of Information LIS 382L.15 Vidya Narayan LIS 385T.6

  2. PDAs • Ubiquitous ? • Going beyond just a Personal Digital Assistant • Various new and novel applications • Data collection • GPS • Survey tools Vidya Narayan LIS 385T.6

  3. Displaying Text in PDAs • PDA have small screens • Displaying lot of text is tricky • Can methods without scrollbars be used? • Rapid Serial Visual Presentation (RSVP) • Series of single words • Compared to 3-line or 10-line text scrolling Vidya Narayan LIS 385T.6

  4. Displaying text (contd) • RSVP comparable to both 3-line and 10-line scroll at low word speeds but performs much better at higher word speeds Vidya Narayan LIS 385T.6

  5. Input of text data • Traditional PDAs use stylus and touchscreen to input data • Graffiti software used to read cursive way writing • Usually needs significant training (of User!) • 85%-93% accurate • Use of touchscreen keypad and stylus • Extremely slow and cumbersome • 16-18 wpm Vidya Narayan LIS 385T.6

  6. Input of text data (contd) QWERTY T9 Large pads Small pads Vidya Narayan LIS 385T.6

  7. Input of text data (contd) • Participants using QWERTY keyboard consistently showed better transcription rates QWERTY (squares) T9 (circles) Vidya Narayan LIS 385T.6

  8. Input of text data (contd) • Some of the newest PDAs are offering QWERTY keyboards Vidya Narayan LIS 385T.6

  9. Combining multiple devices Phone and PDA in two units but well connected Phone and PDA in one unit Vidya Narayan LIS 385T.6

  10. Combining multiple devices (contd) Increased complex Call handling Increased complex Information retrival Vidya Narayan LIS 385T.6

  11. Conclusion • Usability becoming a key issue in new product design • Designers need to consider user abilities and preferences • Complexity of PDA is ever-increasing • What about the novice user? Vidya Narayan LIS 385T.6

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