Table 5.

Descriptive statistics of the System Usability Scale items.

No	Item	Value, mean (SD)
1	I think I would like to use this system frequently.	79.5 (2.13)
2	I found the product unnecessarily complex. (R)a	83.5 (1.15)
3	I thought the product was easy to use.	86.6 (1.29)
4	I think that I would need the support of a technical person to be able to use this product. (R)	91.0 (2.25)
5	I found that the various functions in this product were well integrated.	83.1 (1.79)
6	I thought that there was too much inconsistency in this product. (R)	81.1 (1.26)
7	I would imagine that most people would learn to use this product very quickly.	82.2 (1.28)
8	I found the product very cumbersome to use. (R)	78.7 (2.14)
9	I felt very confident using the product.	87.7 (2.17)
10	I needed to learn a lot of things before I could get going with this product.	82.2 (1.02)

^a(R)=reversed scored item.