Table 2.

ASKSG Items, Sample Percentage of Correct Responses and Estimated Item Difficulty from Rasch Model

NO.	Accuracy (%)	Item difficulty parameter(η)
		Est.	SE
11	92.11	-2.875	0.219
13	85.80	-2.135	0.172
12	81.39	-1.759	0.156
28	78.55	-1.550	0.149
17	76.97	-1.442	0.145
8	76.34	-1.400	0.144
27	76.03	-1.379	0.144
30	74.45	-1.278	0.141
31	74.45	-1.278	0.141
20	71.61	-1.105	0.137
24	71.61	-1.105	0.137
10	71.29	-1.086	0.136
26	70.98	-1.068	0.136
29	69.72	-0.995	0.134
5	66.56	-0.819	0.131
4	57.10	-0.330	0.125
25	54.26	-0.190	0.124
15	53.63	-0.159	0.124
14	53.31	-0.143	0.124
16	50.16	0.010	0.124
19	50.16	0.010	0.124
2	49.84	0.026	0.124
3	49.53	0.041	0.124
9	49.53	0.041	0.124
23	41.96	0.410	0.125
18	37.54	0.631	0.127
7	25.87	1.272	0.138
6	21.14	1.575	0.147
1	20.19	1.641	0.149
22	15.77	1.980	0.163

Items in Table 2 are ranked according to increasing difficulty from top to bottom. The first column number indicates the order in which items appear in the ASKSG