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NAEP Analysis and Scaling → Estimation of NAEP Score Scales → NAEP Assessment Item Response Theory Parameters → Reading Assessment Item Response Theory Parameters → IRT Parameters for the Reading for Literary Experience Scale, by Block and Item, Grade 4 Reading Combined National and State Main Assessment: 2002
NAEP Technical DocumentationIRT parameters for items in the reading for literary experience scale, by block and item, grade 4 reading combined national and state main assessment: 2002
Block Item NAEP ID aj bj cj dj1 dj2 dj3
† Not applicable; c parameters are not estimated for generalized partial credit 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 is 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), 2002 Reading Assessment.
R3 1 R017001 0.63 -0.89 0.00 † † †
2 R017002 1.42 -0.56 0.19 † † †
3 R017003 0.58 -0.03 † 0 -0.41 †
4 R017004 0.90 0.87 0.00 † † †
5 R017005 0.94 0.67 0.24 † † †
6 R017006 0.95 0.95 0.00 † † †
7 R017007 0.47 0.54 † 0 0.20 -0.61
8 R017008 1.10 0.38 0.10 † † †
9 R017009 0.65 -2.18 0.00 † † †
R4 1 R012101 1.68 -1.01 0.26 † † †
2 R012102 0.66 0.06 0.00 † † †
3 R012103 1.33 -0.62 0.14 † † †
4 R012104 0.78 -0.41 0.00 † † †
5 R012105 0.85 0.04 0.18 † † †
6 R012106 0.96 0.21 0.00 † † †
7 R012107 1.42 0.39 0.29 † † †
8 R012108 0.61 -1.24 0.00 † † †
9 R012109 0.46 -1.48 0.00 † † †
10 R012110 0.99 -0.85 0.39 † † †
11 R012111 0.91 1.92 † 2 -1.66 †
12 R012112 0.71 -0.71 0.00 † † †
R5 1 R012601 0.91 0.92 0.00 † † †
2 R012602 1.48 1.08 0.17 † † †
3 R012603 1.55 -0.01 0.24 † † †
4 R012604 1.10 0.87 0.00 † † †
5 R012605 0.93 0.90 0.29 † † †
6 R012606 1.82 0.39 0.35 † † †
7 R012607 0.92 1.08 † 0 -0.10 -0.61
8 R012608 0.55 -0.82 0.36 † † †
9 R012609 1.32 0.77 0.33 † † †
10 R012610 1.71 0.41 0.37 † † †
11 R012611 0.77 0.13 0.00 † † †
R9 1 R015801 1.02 -1.46 0.26 † † †
2 R015802 0.46 -1.08 0.00 † † †
3 R015803 0.68 -1.67 0.00 † † †
4 R015804 0.54 0.51 † 2 -0.44 -1.86
5 R015805 1.11 0.18 0.32 † † †
6 R015806 0.68 0.26 0.00 1 -0.98 †
7 R015807 0.59 -0.01 † 1 -1.28 †
8 R015808 0.61 -1.46 0.29 † † †
9 R015809 0.79 1.30 0.00 † † †
Last updated 16 February 2009 (GF)

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