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Block | Item | NAEP ID | aj | bj | cj | dj1 | dj2 | dj3 |
---|---|---|---|---|---|---|---|---|
H-7 | 5 | H060801 | 0.60 | -0.42 | 0.33 | † | † | † |
9 | H061201 | 1.11 | 1.31 | 0.28 | † | † | † | |
H-8 | 9 | H052101 | 0.68 | -1.05 | 0.27 | † | † | † |
10 | H052102 | 1.16 | 0.33 | 0.30 | † | † | † | |
12 | H052301 | 0.43 | 1.06 | 0.00 | 1.77 | 1.18 | -2.95 | |
15 | H052601 | 0.42 | 1.56 | 0.00 | 1.00 | -1.00 | † | |
H-9 | 1 | H050001 | 1.15 | -0.43 | 0.26 | † | † | † |
9 | H050601 | 1.31 | -0.61 | 0.24 | † | † | † | |
H-10 | 17 | H049901 | 0.66 | 0.66 | 0.30 | † | † | † |
H-11 | 1 | H062001 | 0.70 | -1.19 | 0.00 | 0.64 | -0.64 | † |
3 | H062201 | 0.68 | 0.63 | 0.00 | -0.06 | 0.06 | † | |
8 | H062701 | 1.72 | 0.42 | 0.25 | † | † | † | |
12 | H063101 | 0.61 | 0.62 | 0.00 | 0.60 | -0.60 | † | |
13 | H063201 | 1.16 | 0.25 | 0.21 | † | † | † | |
16 | H063501 | 0.42 | -1.12 | 0.32 | † | † | † | |
17 | H063601 | 0.51 | 0.69 | 0.00 | 0.82 | -0.82 | † | |
18 | H063701 | 0.99 | 1.42 | 0.28 | † | † | † | |
H-12 | 2 | H045601 | 0.88 | 0.01 | 0.35 | † | † | † |
4 | H045801 | 1.43 | 0.15 | 0.26 | † | † | † | |
8 | H046201 | 1.35 | 0.27 | 0.31 | † | † | † | |
H-13 | 1 | H044101 | 1.44 | 1.25 | 0.31 | † | † | † |
9 | H044801 | 1.34 | 0.72 | 0.23 | † | † | † | |
11 | H044902 | 0.81 | 0.33 | 0.26 | † | † | † | |
H-15 | 7 | H064401 | 0.69 | 0.91 | 0.00 | 0.29 | 0.13 | -0.42 |
8 | H064501 | 0.99 | -0.97 | 0.32 | † | † | † | |
Cluster: 5,6 | H0642CL | 0.47 | -0.04 | 0.00 | 0.54 | -0.54 | † | |
H-16 | 3 | H042101 | 0.99 | 0.22 | 0.49 | † | † | † |
4 | H042102 | 0.75 | 0.47 | 0.29 | † | † | † | |
11 | H042701 | 0.55 | -0.81 | 0.27 | † | † | † | |
12 | H042702 | 0.88 | -1.21 | 0.28 | † | † | † | |
16 | H043001 | 0.61 | 0.18 | 0.00 | 0.50 | -0.50 | † | |
17 | H043101 | 0.32 | 0.30 | 0.00 | 1.50 | -1.50 | † | |
† Not applicable; the number of item parameters estimated depends upon the IRT model used for scaling. NOTE: For item j, aj represents the discriminatory power of the item, bj represents a location parameter related to item difficulty, cj represents the guessing parameter, and dji is the category threshold parameter for category i. The c-parameter value is exactly zero for items scaled with the two-parameter logistic model or the generalized partial credit model. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2000 U.S. History Assessment. |