Table of Contents | Search Technical Documentation | References
Block | Item | NAEP ID | aj | bj | cj | dj1 | dj2 | dj3 | dj4 |
---|---|---|---|---|---|---|---|---|---|
M3 | 2 | M093101 | 1.16 | 0.32 | 0.24 | † | † | † | † |
M4 | 1 | M017401 | 0.23 | -5.39 | 0.24 | † | † | † | † |
4 | M017701 | 0.90 | -0.98 | 0.15 | † | † | † | † | |
6 | M017901 | 1.16 | -0.86 | 0.11 | † | † | † | † | |
9 | M018201 | 0.57 | -0.66 | 0.08 | † | † | † | † | |
11 | M018401 | 1.23 | -0.65 | 0.29 | † | † | † | † | |
12 | M018501 | 1.98 | 0.54 | 0.25 | † | † | † | † | |
13 | M018601 | 0.73 | 1.03 | 0.13 | † | † | † | † | |
M5 | 5 | M066401 | 0.74 | -0.02 | 0.20 | † | † | † | † |
M6 | 4A | M020001 | 0.72 | -0.24 | 0.00 | † | † | † | † |
5A | M020101 | 1.30 | -0.38 | 0.00 | † | † | † | † | |
9A | M020501 | 0.80 | -0.34 | 0.00 | † | † | † | † | |
M7 | 3 | M067801 | 0.86 | -1.21 | 0.20 | † | † | † | † |
M8 | 3A | M012431 | 0.89 | -0.17 | 0.14 | † | † | † | † |
4A | M012531 | 0.80 | 0.58 | 0.12 | † | † | † | † | |
8A | M012931 | 1.22 | 0.86 | 0.24 | † | † | † | † | |
12A | N202831 | 0.79 | -1.58 | 0.35 | † | † | † | † | |
13A | M011131 | 0.70 | -1.00 | 0.32 | † | † | † | † | |
15A | M013431 | 1.20 | 0.04 | 0.16 | † | † | † | † | |
16A | M013531 | 1.12 | 1.15 | 0.12 | † | † | † | † | |
17A | M013631 | 1.74 | 0.55 | 0.08 | † | † | † | † | |
M9 | 2A | M052401 | 0.93 | 0.90 | 0.00 | † | † | † | † |
7A | M052901 | 0.74 | 0.07 | 0.00 | † | † | † | † | |
8A | M053001 | 0.90 | 1.31 | 0.00 | † | † | † | † | |
M10 | 6 | M086001 | 1.46 | 1.18 | 0.22 | † | † | † | † |
M11 | 1A | M046001 | 0.42 | -2.62 | 0.00 | † | † | † | † |
4 | M046301 | 0.99 | -1.07 | 0.19 | † | † | † | † | |
6 | M046501 | 1.06 | -0.12 | 0.34 | † | † | † | † | |
9A | M046801 | 0.63 | -1.11 | 0.00 | † | † | † | † | |
10A | M046901 | 0.96 | -1.46 | 0.00 | † | † | † | † | |
M12 | 1 | M091501 | 1.37 | 0.62 | 0.19 | † | † | † | † |
3 | M091601 | 1.06 | 0.41 | 0.23 | † | † | † | † | |
8 | M091901 | 0.49 | -0.07 | 0.12 | † | † | † | † | |
M13 | 1A | M051201 | 0.58 | -1.32 | 0.00 | † | † | † | † |
4 | M051501 | 1.04 | 1.48 | 0.21 | † | † | † | † | |
5A | M051601 | 0.85 | -0.59 | 0.00 | † | † | † | † | |
8 | M051901 | 1.68 | 0.67 | 0.07 | † | † | † | † | |
M14 | 3A | M073001 | 1.48 | 0.12 | 0.19 | † | † | † | † |
4A | M073101 | 1.21 | 0.99 | 0.40 | † | † | † | † | |
7 | M073402 | 2.57 | 1.43 | 0.18 | † | † | † | † | |
9 | M073602 | 0.82 | 1.04 | 0.47 | † | † | † | † | |
9A | M073601 | 0.54 | 1.16 | 0.00 | -0.32 | -0.39 | 0.70 | † | |
M15 | 8A | M075901 | 0.74 | 1.15 | 0.22 | † | † | † | † |
† 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 Mathematics Assessment. |