Comprehensibility

Item ranking

Comprehensibility

Wilcoxon’s test

Excellent (%)

Good (%)

Z

p

Best ranked item within level 1^a

Item #1.6^d

95

5

-

-

Worst ranked item within level 1

Item #7.2

85

7.5

−1.890

0.059

Best ranked item within level 2^b

Item #6.5^e

82.5

10

−2.530

0.011

Worst ranked item within level 2

Item #4.7

75

17.5

−0.884

0.376

Best ranked item within level 3^c

Item #5.7^f

62.5

22.5

−2.360

0.018

Worst ranked item within level 3

Item #4.1

57.5

20

−1.049

0.294