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 
 Realisation

Technical Realisation Language Swift / Environement Xcode Platform iOS

Letter Frequency English Language Monogram Table Bigram Table

Our Interaction 
 Techniques

Better 
 Keyboard flaticon.com

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

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

User Tests

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

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

Results

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

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

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.“

Live Demo