SAS Output

Winsteps Item Parameters with links to ICC/IIF

ID	THRESHOLD	TRIED	RIGHT	ERROR	INMSQ	INZSTD	OUTMS	OUTZSTD	ITEM_TOTAL_CORR	OBSMA	EXPMA	DISCR
I0001	-2.28	30	27	0.62	0.99	0.14	0.82	-0.16	0.22	90.0	90.0	1.03
I0002	-1.95	30	26	0.54	0.95	-0.01	1.01	0.17	0.24	86.7	86.7	1.03
I0003	-1.95	30	26	0.54	1.10	0.37	1.28	0.72	-0.11	86.7	86.7	0.89
I0004	-1.68	30	25	0.50	1.13	0.50	1.27	0.78	-0.16	83.3	83.3	0.83
I0005	-0.89	30	21	0.41	0.95	-0.26	0.92	-0.34	0.32	73.3	70.5	1.15
I0006	1.45	30	6	0.46	1.01	0.12	0.99	0.09	0.17	80.0	80.0	0.99
I0007	0.43	30	12	0.38	0.97	-0.22	0.96	-0.29	0.28	66.7	62.3	1.18
I0008	1.68	30	5	0.50	1.06	0.29	1.11	0.40	0.02	83.3	83.3	0.93
I0009	-1.45	30	24	0.46	0.87	-0.39	0.76	-0.73	0.49	80.0	80.0	1.19
I0010	-1.95	30	26	0.54	0.96	0.03	0.79	-0.36	0.31	86.7	86.7	1.06
I0011	-1.68	30	25	0.50	0.93	-0.11	0.77	-0.55	0.39	83.3	83.3	1.11
I0012	-0.57	30	19	0.39	0.77	-1.98	0.73	-2.03	0.71	70.0	64.5	2.06
I0013	-0.89	30	21	0.41	0.85	-0.87	0.80	-1.04	0.54	73.3	70.5	1.41
I0014	-0.73	30	20	0.40	0.98	-0.09	0.99	-0.01	0.24	70.0	67.4	1.05
I0015	-1.95	30	26	0.54	0.92	-0.09	0.79	-0.36	0.37	86.7	86.7	1.09
I0016	-1.45	30	24	0.46	1.02	0.17	1.24	0.81	0.04	80.0	80.0	0.91
I0017	-1.68	30	25	0.50	0.93	-0.12	0.84	-0.34	0.35	83.3	83.3	1.09
I0018	-1.68	30	25	0.50	1.12	0.48	1.32	0.91	-0.17	83.3	83.3	0.83
I0019	-1.45	30	24	0.46	1.04	0.25	1.01	0.12	0.11	80.0	80.0	0.96
I0020	-2.73	30	28	0.74	0.93	0.09	0.88	0.06	0.27	93.3	93.3	1.04
I0021	-1.45	30	24	0.46	1.10	0.43	1.21	0.73	-0.07	80.0	80.0	0.85
I0022	-1.25	30	23	0.44	0.98	0.01	1.05	0.27	0.18	76.7	76.7	1.00
I0023	-2.73	30	28	0.74	0.98	0.17	0.74	-0.16	0.24	93.3	93.3	1.04
I0024	-1.06	30	22	0.42	0.98	-0.02	1.01	0.14	0.21	76.7	73.6	1.02
I0025	-1.45	30	24	0.46	0.98	0.01	0.88	-0.30	0.28	80.0	80.0	1.06
I0026	-1.25	30	23	0.44	0.95	-0.14	0.90	-0.30	0.31	76.7	76.7	1.09
I0027	-3.47	30	29	1.02	1.01	0.32	0.92	0.27	0.08	96.7	96.7	1.00
I0028	-0.91	30	49	0.26	1.07	0.34	0.86	-0.16	0.29	70.0	70.9	0.99
I0029	-0.84	30	66	0.20	1.22	1.04	1.22	0.84	0.19	33.3	32.7	0.81
I0030	-0.46	30	85	0.15	1.34	1.37	1.48	1.33	0.26	26.7	33.6	0.72

Test Information Function and Test Characteristic Curve

Overview of item difficulty: below -0.5=very easy, above 0.5 = very hard, else = average

Diagnosis of item-total correlation (Negative is bad, below .3 is low)

Detection of misfit items (Outfit Mean squares > 1.5 is bad)