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NAEP Analysis and Scaling → Estimation of NAEP Scale Scores → NAEP Assessment IRT Parameters → Economics Assessment IRT Parameters → IRT Parameters for the International Economy Scale, Grade 12 Economics National Main Assessment, by Item and Block: 2006
| Block | Item | NAEP ID | aj | bj | cj | dj1 | dj2 | dj3 | dj4 | dj5 |
|---|---|---|---|---|---|---|---|---|---|---|
| † Not applicable; c parameters are not estimated for 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 exactly zero 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), 2006 Economics Assessment. |
||||||||||
| EA | 5 | E000401 | 0.69 | -0.23 | 0.17 | † | † | † | † | † |
| 7 | E000601 | 0.63 | 0.46 | 0.18 | † | † | † | † | † | |
| 16 | E001501 | 0.32 | 3.13 | † | 1.28 | -1.28 | † | † | † | |
| EB | 2 | E001801 | 0.48 | 0.66 | 0.19 | † | † | † | † | † |
| 7 | E002301 | 0.64 | -0.15 | 0.16 | † | † | † | † | † | |
| 8 | E002401 | 0.44 | 0.34 | 0.16 | † | † | † | † | † | |
| EC | 11 | E004501 | 0.98 | 1.22 | 0.17 | † | † | † | † | † |
| ED | 3 | E005601 | 0.64 | 1.48 | 0.14 | † | † | † | † | † |
| 14 | E006701 | 0.55 | 0.67 | 0.19 | † | † | † | † | † | |
| 18 | E007101 | 0.40 | 1.85 | 0.20 | † | † | † | † | † | |
| EE | 3 | E007401 | 0.37 | 0.53 | 0.17 | † | † | † | † | † |
| 10 | E008101 | 0.50 | 0.43 | 0.15 | † | † | † | † | † | |
| EF | 7 | E009901 | 0.88 | -0.57 | 0.16 | † | † | † | † | † |
| 11 | E010301 | 0.53 | -0.63 | 0.17 | † | † | † | † | † | |
| 12 | E010401 | 0.81 | 2.99 | 0.09 | † | † | † | † | † | |
| EG | 1 | E011101 | 0.67 | -1.17 | 0.16 | † | † | † | † | † |
| 12 | E012201 | 0.75 | -0.31 | 0.16 | † | † | † | † | † | |
| 15 | E012501 | 0.89 | -0.61 | 0.14 | † | † | † | † | † | |
| EH | 1 | E012901 | 0.47 | -0.84 | 0.17 | † | † | † | † | † |
| 10 | E013801 | 0.22 | -0.25 | 0.18 | † | † | † | † | † | |
| EI | 2 | E015001 | 0.61 | -0.29 | 0.16 | † | † | † | † | † |
| 4 | E015201 | 0.43 | 1.15 | † | 0.66 | -0.66 | † | † | † | |
| 17 | E016501 | 0.76 | 0.36 | 0.15 | † | † | † | † | † | |
| 19 | E016701 | 1.17 | 0.48 | 0.15 | † | † | † | † | † | |
| EJ | 9 | E017701 | 0.45 | 0.66 | † | 0.82 | 0.88 | 0.70 | -2.40 | † |
| 16 | E018401 | 0.81 | 0.62 | 0.15 | † | † | † | † | † | |
| 18 | E018601 | 0.29 | 0.22 | 0.16 | † | † | † | † | † | |
Last updated 10 December 2009 (JL)
