Large-scale Assessments in Education

An IERI – International Educational Research Institute Journal

Table 3 Descriptive statistics for group proficiency parameters

From: Detecting differential item functioning using generalized logistic regression in the context of large-scale assessments

Group	M	SD	N	M	SD	N
1	.32	.56	5460	.32	.56	5460
2	.26	.55	6328	−1.15	.72	5733
3	.25	.58	5481	.26	.55	6328
4	.86	.56	5236	.79	.63	5474
5	.29	.69	5362	.25	.58	5481
6	-.30	.69	5537	.26	.64	4179
7	.40	.58	5362	.86	.56	5236
8	-.24	.74	6370	.52	.71	5341
9	−1.47	.74	6545	.29	.69	5362
10	.11	.58	4494	−1.34	.81	5117
11				-.30	.69	5537
12				-.80	.71	5187
13				.40	.58	5362
14				-.30	.69	3983
15				-.24	.74	6370
16				.45	.62	5845
17				−1.47	.74	6545
18				.60	.68	3297
19				.11	.58	4494
20				.50	.51	4571

Note. The means (M) and standard deviations (SDs) here represent distributional parameters from which N samples for each group were drawn.

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