Table of Contents | Search Technical Documentation | References
Block | Item | NAEP ID | aj | bj | cj | dj1 | dj2 | dj3 | dj4 |
---|---|---|---|---|---|---|---|---|---|
M1 | 2 | M188701 | 0.91 | -0.32 | 0.19 | † | † | † | † |
4 | M182401 | 1.82 | 1.30 | 0.19 | † | † | † | † | |
12 | M1867CL | 0.36 | -0.38 | † | -0.22 | 1.47 | -0.72 | -0.53 | |
14 | M175901 | 0.78 | 3.00 | † | 0.63 | -0.63 | † | † | |
M2 | 2 | M305601 | 0.82 | -0.42 | 0.19 | † | † | † | † |
4 | M306701 | 0.41 | 0.71 | † | 0.07 | -0.07 | † | † | |
8 | M304901 | 1.03 | -0.05 | 0.16 | † | † | † | † | |
12 | M301701 | 1.13 | 1.05 | 0.14 | † | † | † | † | |
M3 | 3 | M197201 | 0.52 | -0.60 | 0.17 | † | † | † | † |
13 | M195401 | 0.14 | -0.33 | 0.20 | † | † | † | † | |
M4 | 2 | M1842CL | 0.78 | -1.33 | † | 1.00 | -1.00 | † | † |
3 | M1843CL | 0.89 | 1.29 | † | 0.14 | -0.14 | † | † | |
4 | M184207 | 0.60 | 1.66 | † | -0.60 | 0.60 | † | † | |
9 | M179101 | 0.71 | 0.01 | 0.19 | † | † | † | † | |
M5 | 1 | M183001 | 1.04 | -0.61 | 0.21 | † | † | † | † |
5 | M183201 | 0.77 | 0.60 | 0.17 | † | † | † | † | |
10 | M188101 | 1.01 | 0.02 | 0.28 | † | † | † | † | |
M6 | 2 | M198101 | 0.89 | -0.06 | 0.14 | † | † | † | † |
8 | M175601 | 0.56 | -0.30 | † | -1.06 | 1.06 | † | † | |
11 | M177201 | 0.96 | 0.17 | 0.16 | † | † | † | † | |
12 | M177202 | 0.94 | 1.13 | † | † | † | † | † | |
M7 | 1 | M309201 | 1.29 | -0.45 | 0.18 | † | † | † | † |
6 | M307901 | 0.65 | -0.79 | 0.19 | † | † | † | † | |
10 | M308201 | 1.20 | 1.11 | 0.13 | † | † | † | † | |
13 | M310001 | 0.58 | 0.16 | † | 0.49 | -0.50 | 0.01 | † | |
M8 | 5 | M189301 | 1.43 | 0.19 | 0.25 | † | † | † | † |
8 | M189501 | 0.61 | 0.71 | 0.18 | † | † | † | † | |
10 | M187101 | 1.25 | 0.47 | 0.24 | † | † | † | † | |
12 | M178601 | 1.38 | 0.33 | 0.11 | † | † | † | † | |
M9 | 3 | M198701 | 0.85 | 0.25 | † | † | † | † | † |
4 | M177601 | 0.54 | 0.98 | 0.16 | † | † | † | † | |
7 | M181901 | 0.98 | 0.34 | 0.15 | † | † | † | † | |
11 | M193601 | 1.35 | -0.34 | 0.11 | † | † | † | † | |
M10 | 2 | M189601 | 0.99 | -0.21 | 0.18 | † | † | † | † |
4 | M194201 | 0.82 | -0.26 | 0.16 | † | † | † | † | |
5 | M178401 | 1.15 | -0.24 | 0.12 | † | † | † | † | |
M11 | 5 | M181201 | 0.64 | -0.73 | † | † | † | † | † |
6 | M181202 | 1.23 | 0.69 | † | 1.64 | -1.64 | † | † | |
7 | M181203 | 0.50 | 3.20 | † | † | † | † | † | |
M12 | 4 | M175301 | 0.94 | -0.19 | 0.15 | † | † | † | † |
5 | M199901 | 0.75 | 0.30 | 0.17 | † | † | † | † | |
M13 | 3 | M302701 | 0.43 | 0.22 | † | -6.25 | 6.25 | † | † |
5 | M304101 | 0.86 | -0.25 | 0.17 | † | † | † | † | |
11 | M304701 | 0.69 | 1.64 | 0.15 | † | † | † | † | |
M14 | 6 | M310201 | 1.40 | 1.61 | 0.06 | † | † | † | † |
8 | M310501 | 0.46 | 0.63 | † | -5.35 | 5.35 | † | † | |
11 | M310901 | 0.61 | 2.00 | 0.18 | † | † | † | † | |
12 | M3111CL | 0.80 | 1.97 | † | 0.24 | 1.42 | -3.50 | 1.83 | |
† 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. |