Preference questionnaire
Subject No.________
Please choose an option that best describes your answer for each question.
1.	Which button size do you prefer most?
	10 mm	15 mm	20 mm	25 mm
2.	Which ratio of graphics to text (“light”) do you prefer most?
	3:1	1:1		1:3
3.	Which icon style do you prefer?
	Flat		Skeuomorph