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Block | Item | NAEP ID | aj | bj | cj | dj1 | dj2 | dj3 | dj4 |
---|---|---|---|---|---|---|---|---|---|
M3 | 1 | M342701 | 0.89 | -1.58 | 0.10 | † | † | † | † |
3 | M341301 | 0.52 | -2.64 | 0.15 | † | † | † | † | |
4 | M344201 | 0.90 | -0.17 | 0.21 | † | † | † | † | |
6 | M341801 | 0.45 | 1.64 | † | † | † | † | † | |
12 | M345001 | 0.83 | 0.03 | 0.14 | † | † | † | † | |
14 | M226701 | 1.16 | 1.61 | 0.25 | † | † | † | † | |
M4 | 6 | M147201 | 0.49 | -1.75 | 0.22 | † | † | † | † |
8 | M147401 | 0.74 | -1.14 | 0.05 | † | † | † | † | |
9 | M147501 | 1.00 | -0.72 | 0.12 | † | † | † | † | |
11 | M147701 | 1.51 | 1.04 | 0.16 | † | † | † | † | |
13 | M147901 | 1.24 | 0.57 | 0.15 | † | † | † | † | |
14 | M148001 | 2.08 | 1.43 | 0.18 | † | † | † | † | |
15 | M148101 | 0.48 | 1.71 | † | -0.09 | 0.09 | † | † | |
M5 | 1 | M218501 | 1.60 | 0.50 | 0.08 | † | † | † | † |
2 | M218502 | 1.57 | 0.59 | † | † | † | † | † | |
3 | M218503 | 2.08 | 0.19 | 0.13 | † | † | † | † | |
4 | M2185CL | 0.73 | 1.31 | † | 1.11 | -1.55 | 0.44 | † | |
10 | M219101 | 0.74 | -0.13 | 0.21 | † | † | † | † | |
14 | M219501 | 0.50 | -0.11 | † | -0.20 | 0.20 | † | † | |
M6 | 3 | M340201 | 0.31 | -1.22 | † | -6.03 | 6.03 | † | † |
5 | M340901 | 0.80 | -0.18 | 0.16 | † | † | † | † | |
8 | M339801 | 0.87 | 0.17 | 0.34 | † | † | † | † | |
10 | M343201 | 0.55 | 0.49 | † | 0.82 | -0.82 | † | † | |
12 | M229701 | 0.79 | 1.84 | 0.32 | † | † | † | † | |
13 | M343001 | 0.79 | -0.11 | † | † | † | † | † | |
15 | M344401 | 0.48 | 1.51 | † | -6.13 | 6.13 | † | † | |
M7 | 2 | M347101 | 0.79 | -2.04 | 0.11 | † | † | † | † |
4 | M346201 | 0.69 | -0.76 | 0.21 | † | † | † | † | |
5 | M241301 | 1.35 | 0.46 | 0.14 | † | † | † | † | |
12 | M347901 | 0.64 | 0.43 | † | -1.75 | 1.75 | † | † | |
15 | M347601 | 0.44 | 0.88 | 0.14 | † | † | † | † | |
M8 | 1 | M240101 | 1.02 | -0.57 | 0.27 | † | † | † | † |
4 | M229901 | 0.83 | -1.01 | 0.23 | † | † | † | † | |
8 | M230801 | 1.34 | -0.51 | 0.22 | † | † | † | † | |
9 | M240801 | 1.00 | -0.24 | † | † | † | † | † | |
12 | M240901 | 0.95 | -0.18 | 0.17 | † | † | † | † | |
14 | M241401 | 0.65 | -0.16 | 0.12 | † | † | † | † | |
M9 | 2 | M225401 | 0.80 | -0.41 | 0.18 | † | † | † | † |
5 | M228601 | 0.68 | -0.97 | 0.24 | † | † | † | † | |
7 | M225101 | 1.01 | 0.63 | 0.17 | † | † | † | † | |
8 | M229301 | 1.77 | 0.34 | 0.19 | † | † | † | † | |
11 | M338601 | 0.97 | -0.06 | 0.16 | † | † | † | † | |
14 | M338801 | 1.27 | 1.44 | † | † | † | † | † | |
15 | M338901 | 1.20 | 0.41 | 0.26 | † | † | † | † | |
M10 | 6 | M220201 | 0.45 | -2.10 | 0.20 | † | † | † | † |
9 | M220501 | 0.92 | 1.10 | 0.34 | † | † | † | † | |
11 | M220701 | 0.30 | -0.78 | † | -4.54 | 4.54 | † | † | |
12 | M220801 | 1.71 | 1.25 | 0.07 | † | † | † | † | |
13 | M220901 | 2.25 | 1.16 | 0.26 | † | † | † | † | |
14 | M221001 | 0.83 | -0.10 | 0.27 | † | † | † | † | |
M11 | 1 | M158001 | 1.07 | 0.19 | 0.28 | † | † | † | † |
3 | M161101 | 0.98 | -0.94 | 0.14 | † | † | † | † | |
6 | M161601Z | 0.89 | 0.30 | † | † | † | † | † | |
8 | M159701 | 0.68 | -1.91 | 0.10 | † | † | † | † | |
10 | M155201 | 0.58 | -1.41 | 0.13 | † | † | † | † | |
15 | M162201 | 0.78 | 1.83 | † | -0.54 | 0.54 | † | † | |
M12 | 1 | M223901 | 0.84 | -1.75 | 0.11 | † | † | † | † |
2 | M339001 | 0.58 | -1.68 | 0.09 | † | † | † | † | |
9 | M224801 | 0.80 | -1.11 | 0.10 | † | † | † | † | |
11 | M339301 | 1.15 | 0.34 | 0.18 | † | † | † | † | |
13 | M228501 | 1.18 | 0.58 | 0.21 | † | † | † | † | |
† Not applicable;
c parameters are not estimated for the two-parameter logistic model or generalized partial credit models, and
d parameters are not estimated for two-parameter or three-parameter logistic models. 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 represents the category threshold parameter for category i. The c parameter value is assumed to be exactly zero and is not estimated for items scaled with the two-parameter logistic model. For item j, dji may not sum to zero because of rounding. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2015 Mathematics Assessment. |