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Better Keyboard Melvin Rudolph & Johannes Pfleghar Motivation - PowerPoint PPT Presentation

Better Keyboard Melvin Rudolph & Johannes Pfleghar Motivation Motivation Hard typing on smartphone keyboards Improve writing experience Small buttons lead to errors Related Work Related Work Car Navigation Apple Keyboard Technical


  1. Better 
 Keyboard Melvin Rudolph & Johannes Pfleghar

  2. Motivation

  3. Motivation Hard typing on smartphone keyboards Improve writing experience Small buttons lead to errors

  4. Related Work

  5. Related Work Car Navigation Apple Keyboard

  6. Technical 
 Realisation

  7. Technical Realisation Language Swift / Environement Xcode Platform iOS

  8. Letter Frequency English Language Monogram Table Bigram Table

  9. Our Interaction 
 Techniques

  10. Better 
 Keyboard flaticon.com

  11. Better Keyboard 1 • 3 highlighted keys • based on frequencies 
 (monogram | bigram) • highlighted keys change with every 
 user input • key enlarged by 4px in width and 6px in height

  12. Better Keyboard 2 • keys get enlarged or shrinked • changes only in width • based on frequencies 
 (monogram | bigram) • keys size changes with every 
 user input

  13. User Tests

  14. Test Setup 6 Participants Type in short texts Measuring time and Questionaire after test mistakes

  15. Test Setup • User gets to test both keyboards • 4 different texts to type • Keyboard and text in different order each time Start: • Time gets measured • Error for every time delete button pressed Stop: • Time for current text • Errors for current text

  16. Results

  17. Results Time Mistakes 300 sec 100 271 sec 80 203 sec 152 sec 146 sec 35 123 sec 100 sec 30 106 sec 22 13 1 2 Keyboard 1 Keyboard 1 Keyboard 2 Keyboard 2

  18. Results Letters 
 Letters 
 per second 
 per second 
 1,388 1,408 Errors 
 Errors 
 per second 
 per second 
 0,142 0,086 Keyboard 1 Keyboard 2

  19. Results „Keyboard 1 was more intuitive.“ „On Keyboard 2 you tend to mistype more often.“ „Keyboard 1 is much more cooler.“ „Keyboard 2 felt better.“ „Keyboard 2 felt more fluently.“

  20. Live Demo

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