Test review of Iranian university entrance exam: English Konkur examination

Khodi, Ali; Alavi, Sayyed Mohammad; Karami, Hossein

doi:10.1186/s40468-021-00125-6

Language Testing in Asia

Table 2 IRT analysis and dimensionality assessment

From: Test review of Iranian university entrance exam: English Konkur examination

Item	Unidimensional		Bifactor		Testlet
	X ²	Probability	X ²	Probability	X ²	Probability
1	75.29	0.0001	72.59	0.0001	19.72	0.0002
2	24.4	0.0179	25.16	0.0141	13.07	0.0703
3	20.22	0.0095	21.66	0.0056	7.9	0.0952
4	25.42	0.0625	27.12	0.0401	4.1	0.3937
5	60.38	0.0001	70.59	0.0001	9.6	0.0222
6	28.61	0.0118	28.4	0.0079	22	0.0012
7	39.95	0.0051	37.96	0.0089	21.24	0.0194
8	25.34	0.1884	24.99	0.1603	19.52	0.034
9	25.85	0.0039	24.86	0.0031	6.99	0.0304
10	18.48	0.3611	18.76	0.2807	13.26	0.103
11	48.13	0.0001	46.59	0.0001	30.84	0.0001
12	35.76	0.0019	36.25	0.0016	8.06	0.1529
13	15.58	0.3417	15.99	0.249	12.81	0.0766
14	55.6	0.0001	56.17	0.0001	44.71	0.0001
15	88.4	0.0001	80.13	0.0001	20.09	0.0012
16	23.92	0.0208	25.1	0.0051	11.95	0.0629
17	28.48	0.0123	29.32	0.0094	14.43	0.0711
18	82.43	0.0001	69.5	0.0001	13.2	0.0042
19	38.59	0.0012	37.29	0.0011	8.75	0.1876
20	74.45	0.0001	63.45	0.0001	38.5	0.0001
21	18.35	0.1909	18.08	0.1542	7.42	0.2856
22	49.08	0.0003	48.4	0.0004	29.94	0.0002
23	22.47	0.0693	22.48	0.0482	13.92	0.0524
24	25.21	0.0216	26.18	0.0101	9.59	0.1428
25	40.38	0.0001	45.9	0.0001	14.81	0.002
26	59.15	0.0001	63.82	0.0001	22.28	0.0001
27	10.89	0.8167	10.7	0.7744	12.32	0.1954
28	49.23	0.0001	49.62	0.0001	16.99	0.0488
29	25.43	0.1132	25.59	0.082	19	0.0884
30	27.26	0.0985	27.33	0.0728	13.76	0.088
31	27.54	0.0505	28.85	0.0501	13.56	0.1935
32	84.17	0.0001	85.94	0.0001	43.32	0.0001
33	56.35	0.0001	58.48	0.0001	17.26	0.004
34	23.51	0.3166	23.9	0.1994	9.51	0.3933
35	53.4	0.0001	55	0.0001	24.18	0.0005
36	24.43	0.1795	25.3	0.1506	6.51	0.6889
37	41	0.0001	42.57	0.0001	28.3	0.0001
38	18.31	0.0744	18.75	0.0655	8.27	0.3113
39	37.26	0.0007	39.07	0.0001	25.83	0.0005
40	15.35	0.5007	17.44	0.3595	13.13	0.1072
41	65.08	0.0001	65.61	0.0001	33.08	0.0001
42	28.35	0.0568	32.59	0.0186	12.23	0.1407
43	34.78	0.0042	35.21	0.0014	19.38	0.0129
44	15.49	0.4909	15.41	0.4243	5.99	0.4252
45	64.69	0.0001	64.96	0.0001	35.73	0.0001
46	36.11	0.0102	35.69	0.0077	17.03	0.0092
47	25.72	0.058	26.99	0.0192	16.91	0.0179
48	37.82	0.0026	37.71	0.0017	20.04	0.0027
49	18.15	0.1996	18.15	0.1515	11.14	0.084
50	18.47	0.4265	18.55	0.4215	11.75	0.1621
51	25.22	0.1925	26.42	0.0904	14.39	0.072
52	33.87	0.0007	34.41	0.0003	12.38	0.0299
53	14.33	0.5024	14.97	0.382	11.14	0.1323
54	45.02	0.0001	44.56	0.0001	14.89	0.0108
55	33.21	0.0106	36.23	0.0027	9.08	0.3372
56	26.26	0.1569	26.42	0.0902	14.72	0.0986
57	17.07	0.2516	17.51	0.1765	5.56	0.4754
58	45.74	0.0001	45.26	0.0001	20.66	0.0001
59	31.64	0.0111	32.97	0.0029	23.01	0.0001
60	33.27	0.0015	33.32	0.0009	19.62	0.0032
61	29.57	0.0573	29.58	0.0416	19.75	0.0195
62	48.38	0.0004	48.58	0.0002	22	0.0088
63	18.68	0.5443	19.06	0.39	10.26	0.4195
64	13.37	0.5751	13.54	0.4859	16.02	0.0663
65	25.85	0.056	26.62	0.0319	11.34	0.1827
66	22.74	0.1206	21.78	0.1134	14.82	0.0383
67	18.73	0.2254	18.71	0.1319	23.35	0.0003
68	47.3	0.0001	48.86	0.0001	18.57	0.0173
69	21.79	0.2409	22.82	0.1547	13.57	0.0935
70	36.91	0.0022	37.22	0.0012	21.84	0.0094

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