TABLE 2.

Questionnaires about usability of system in a laboratory-based study

Number	Item of questionnaires	Score
1	I can confirm about a question-answering time with this system.	2.75
2	I think that I would like to use this system frequently.	2.75
3	I thought the system was too difficult to use.	2.5
4	I think that I would need the support of a technical person to be able to use this system.	3.25
5	I thought there was too much inconsistency in this system.	3.75
6	I would imagine that most people would learn to use this system very quickly.	2.25
7	I think that I could use this system without getting nervous	3.75
8	I needed to learn a lot of things before I could get going with this system.	1.75
9	I think I can continue to use this system for 1 month without become bored of it.	2.5