TABLE 3.

Questionnaires about usability of system in a home-based study

Number	Item of questionnaire	Score
1	I can confirm about a question-answering time with this system.	1
2	I think that I would like to use this system frequently.	2
3	I thought the system was too difficult to use.	4.5
4	I think that I would need the support of a technical person to be able to use this system.	3
5	I thought there was too much inconsistency in this system.	4.5
6	I would imagine that most people would learn to use this system very quickly.	2
7	I found the system very cumbersome to use	4
8	I think that I could use this system without getting nervous	2
9	I needed to learn a lot of things before I could get going with this system.	4
10	I think I can continue to use this system for 1 month without becoming bored of it.	2