- Surveys & Programs
- Data & Tools
- Fast Facts
- News & Events
- Publications & Products
- About Us
Table of Contents | Search Technical Documentation | References
NAEP Analysis and Scaling → Estimation of NAEP Score Scales → NAEP Assessment IRT Parameters → Mathematics Assessment IRT Parameters → IRT Parameters for Items in the Number Properties and Operations Subscale, Grade 12 Mathematics Combined National and State Assessment, by Item and Block: 2013
| Block | Item | NAEP ID | aj | bj | cj | dj1 | dj2 | dj3 | dj4 |
|---|---|---|---|---|---|---|---|---|---|
| † 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), 2013 Mathematics Assessment. | |||||||||
| MA | 6 | M185901 | 1.80 | 1.73 | .17 | † | † | † | † |
| 10 | M183901 | 1.33 | 0.19 | † | † | † | † | † | |
| MB | 3 | M304501 | 1.18 | 0.62 | .15 | † | † | † | † |
| MC | 2 | M181701 | 0.72 | -1.84 | .16 | † | † | † | † |
| 9 | M197401 | 1.29 | -0.16 | .18 | † | † | † | † | |
| MD | 5 | M177001 | 1.14 | -0.20 | .29 | † | † | † | † |
| 12 | M197801 | 1.12 | 0.72 | .22 | † | † | † | † | |
| ME | 2 | M175701 | 1.00 | 0.64 | .23 | † | † | † | † |
| 12 | M180301 | 1.12 | 2.02 | .05 | † | † | † | † | |
| MF | 1 | M182901 | 1.57 | 1.82 | .26 | † | † | † | † |
| MG | 4 | M310401 | 1.34 | -0.53 | † | † | † | † | † |
| MH | 3 | M193101 | 0.85 | 1.15 | † | † | † | † | † |
| MI | 6 | M194101 | 1.02 | 0.54 | .14 | † | † | † | † |
| MJ | 1 | M199001 | 1.32 | -1.03 | .20 | † | † | † | † |
| MK | 3 | M180601 | 1.76 | 0.84 | .21 | † | † | † | † |
| 8 | M184401 | 1.25 | 0.48 | .16 | † | † | † | † | |
| ML | 1 | M199701 | 0.77 | -1.42 | .17 | † | † | † | † |
| 9 | M181801 | 1.73 | 1.02 | † | † | † | † | † | |
| 14 | M178701 | 0.56 | 3.04 | † | 0.08 | -1.60 | 1.52 | † | |
| MM | 1 | M302401 | 0.77 | -0.03 | .14 | † | † | † | † |
| 8 | M301201 | 1.41 | 0.29 | .11 | † | † | † | † | |
| MN | 3 | M308401 | 1.11 | 0.31 | .11 | † | † | † | † |
Last updated 21 May 2017 (DC)
