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

Melvin Rudolph & Johannes Pfleghar

Better
 Keyboard

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

Monogram Table Bigram Table English Language

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 Measuring time and mistakes Type in short texts Questionaire after test

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 300 sec

146 sec 203 sec 80 35 22 1 2 13 271 sec 152 sec 106 sec 123 sec

100 sec 100 30 Mistakes Keyboard 1 Keyboard 2 Keyboard 1 Keyboard 2

Keyboard 1 Keyboard 2

Letters
 per second
 1,388 Errors
 per second
 0,142 Letters
 per second
 1,408 Errors
 per second
 0,086

Results

Results

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

Live Demo