Table 3. Item characteristics.

Item	Mean (SD)	Median	Missing (%)	Skewness**	Kurtosis*
1	2.34 (1.0)	3	2 (0,54%)	-0,98	1.80
2	2.92 (0.84)	3	0	-0.58	2.90
3	3.18 (0.93)	3	1 (0.27%)	-0.70	2.28
4	3.19 (0.86)	3	1 (0.27%)	-0.96	3.35
5	1.98 (1.02)	2	0	0.78	2.49
6	2.84 (0.84)	3	1 (0.27%)	-0.56	2.91
7	3.08 (0.91)	3	1 (0.27%)	-0.63	2.41
8	2.95 (0.94)	3	1 (0.27%)	-0.32	1.96
9	3.39 (0.93)	4	1 (0.27%)	-1.30	3.46
10	3.06 (1.07)	3	3 (0.81%)	-0.78	2.26
11	2.84 (1.12)	3	7 (1.89%)	-0.46	1.83
12	3.47 (0.83)	4	4 (1.08%)	-1.52	4.46
13	3.87 (0.43)	4	1 (0.27%)	-3.74	18.55
14	3.78 (0.50)	4	5 (1.32%)	-2.35	8.44
15	3.74 (0.56)	4	1 (0.26%)	-2.48	9.96
16	3.71 (0.57)	4	1 (0.26%)	-2.17	8.08
17	3.90 (0.38)	4	1 (0.26%)	-4.32	23.20
18	3.82 (0.45)	4	1 (0.26%)	-2.67	10.67
19	3.47 (0.66)	4	1 (0.26%)	-1.21	4.55
20	1.59 (0.82)	1	3 (0.81%)	1.36	4.20
21	2.56 (1.12)	3	3 (0.81%)	-0.11	1.64
22	3.56 (0.84)	4	0	-1.83	5.27
Total	3.14	3.23

* Kurtosis: 3 = normal distribution, >3 = leptokurtic, produces more outliers than normal distribution, and <3 = platykurtic, produces fewer and less extreme outliers than normal distribution[16]

**Skewness 0 = normal distribution <0 = the distribution is skewed to the left, the mean is lower than the median