Table 2.

External reviewer quality grading (1 = lowest, 10 = highest) and ranking (1–12) of usability evaluation protocols (n = 24)

	Use Case 1 (n = 12)			Use Case 2 (n = 12)
Rank	Quality rating	Condition	Experience score	Quality rating	Condition	Experience score
1	10	+IUT	1	8	+IUT	48
2	9	−IUT	45	8	−IUT	49
3	9	+IUT	6	7	+IUT	64
4	8	+IUT	72	7	−IUT	48
5	8	+IUT	2	7	−IUT	64
6	8	+IUT	80	5	−IUT	2
7	7	−IUT	48	5	+IUT	15
8	6	−IUT	9	4	+IUT	32
9	6	−IUT	18	3	−IUT	25
10	5	+IUT	16	3	+IUT	81
11	3	−IUT	20	3	−IUT	40
12	2	−IUT	36	2	+IUT	36