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Table of Contents | Search Technical Documentation | References
NAEP Analysis and Scaling → Estimation of NAEP Score Scales → NAEP Assessment IRT Parameters → Technology and Engineering Literacy (TEL) Assessment IRT Parameters → IRT Parameters for Items in the Univariate Scale, Grade 8 Technology and Engineering Literacy (TEL) National Assessment, by Assembly Unit and Item: 2018
NAEP Technical DocumentationIRT Parameters for Items in the Univariate Scale, Grade 8 Technology and Engineering Literacy (TEL) National Assessment, by Assembly Unit and Item: 2018
| Assembly unit | Item | NAEP ID | aj | bj | cj | dj1 | dj2 | dj3 | dj4 | dj5 |
|---|---|---|---|---|---|---|---|---|---|---|
| T1 | 1 | D0001CL | 0.77 | 1.69 | † |
† |
† |
† |
† |
† |
| 2 | D0002CL | 0.73 | 0.21 | † |
† |
† |
† |
† |
† | |
| 3 | D0003CL | 0.74 | -1.35 | † | 0.55 | -0.55 | † | † | † | |
| 4 | D000401 | 0.62 | 0.29 | 0.12 | † | † | † | † | † | |
| 5 | D0005CL | 0.91 | -0.61 | † | 0.43 | -0.43 | † | † | † | |
| 6 | D000601 | 0.90 | -0.61 | † | † | † | † | † | † | |
| 7 | D000701 | 1.03 | -1.41 | † | † | † | † | † | † | |
| 8 | D000801 | 0.63 | -0.48 | † | 0.89 | -0.89 | † | † | † | |
| 9 | D0009CL | 0.39 | -1.55 | † | † | † | † | † | † | |
| 10 | D022101 | 0.50 | -0.11 | † | 0.25 | -0.25 | † | † | † | |
| 11 | D016401 | 0.53 | 0.29 | 0.23 | † | † | † | † | † | |
| 12 | D0229CL | 0.74 | 0.43 | † | † | † | † | † | † | |
| T3 | 1 | D0016CL | 1.07 | -0.91 | † | † | † | † | † | † |
| 2 | D001701 | 0.94 | -0.25 | 0.17 | † | † | † | † | † | |
| 3 | D001801 | 0.94 | -0.30 | † | † | † | † | † | † | |
| 4 | D001901 | 0.92 | 0.00 | 0.20 | † | † | † | † | † | |
| 5 | D0020CL | 0.84 | -0.01 | † | † | † | † | † | † | |
| 6 | D002101 | 0.88 | 0.76 | 0.24 | † | † | † | † | † | |
| 7 | D002201 | 0.56 | 0.63 | † | 1.56 | -1.56 | † | † | † | |
| 8 | D0023CL | 0.64 | -1.15 | † | -0.35 | 0.35 | † | † | † | |
| 9 | D002401 | 0.61 | -0.11 | † | 0.33 | -0.33 | † | † | † | |
| 10 | D002501 | 0.86 | -0.65 | † | † | † | † | † | † | |
| 11 | D002601 | 0.74 | -0.72 | † | † | † | † | † | † | |
| T5 | 1 | D003701 | 0.94 | -0.65 | † | † | † | † | † | † |
| 2 | D003801 | 0.92 | -0.94 | † | † | † | † | † | † | |
| 3 | D003901 | 0.66 | -2.29 | † | † | † | † | † | † | |
| 4 | D004001 | 0.70 | -0.80 | † | † | † | † | † | † | |
| 5 | D004101 | 0.39 | -0.84 | † | -0.64 | 0.64 | † | † | † | |
| 6 | D004201 | 0.51 | 1.58 | † | † | † | † | † | † | |
| 7 | D004301 | 0.74 | 0.81 | † | † | † | † | † | † | |
| 8 | D004401 | 0.53 | -0.99 | † | † | † | † | † | † | |
| 9 | D0045CL | 0.40 | -0.55 | † | † | † | † | † | † | |
| 10 | D004601 | 0.99 | -0.78 | † | † | † | † | † | † | |
| 11 | D004701 | 0.28 | -1.22 | † | 0.06 | -0.06 | † | † | † | |
| T6 | 1 | D004801 | 0.62 | -0.58 | † | 0.88 | -0.88 | † | † | † |
| 2 | D004901 | 0.93 | -1.54 | † | † | † | † | † | † | |
| 3 | D005001 | 0.50 | 0.05 | † | 0.36 | -0.36 | † | † | † | |
| 4 | D005002 | 0.42 | -0.88 | † | -0.06 | 0.06 | 0.00 | † | † | |
| 5 | D005101 | 0.48 | 1.16 | † | † | † | † | † | † | |
| 6 | D0052CL | 0.66 | -2.51 | † | † | † | † | † | † | |
| 7 | D005301 | 0.72 | -0.29 | † | -0.22 | 0.22 | † | † | † | |
| 8 | D0054CL | 0.71 | 0.40 | † | † | † | † | † | † | |
| 9 | D005501 | 0.95 | 0.91 | 0.23 | † | † | † | † | † | |
| T7 | 1 | D005601 | 0.57 | -0.63 | † | † | † | † | † | † |
| 2 | D005701 | 0.82 | -1.00 | 0.20 | † | † | † | † | † | |
| 3 | D005801 | 0.91 | -0.53 | † | † | † | † | † | † | |
| 4 | D005901 | 0.57 | 0.65 | † | 0.06 | 0.74 | -0.80 | † | † | |
| 5 | D0060CL | 0.56 | -0.66 | † | -0.09 | 0.26 | -0.44 | 0.27 | † | |
| 6 | D006101 | 0.63 | 0.74 | † | † | † | † | † | † | |
| 7 | D006201 | 0.57 | 1.05 | † | 0.54 | -0.54 | † | † | † | |
| 8 | D0063CL | 0.95 | 0.48 | † | † | † | † | † | † | |
| T8 | 1 | D018101 | 0.77 | -0.15 | 0.20 | † | † | † | † | † |
| 2 | D0208CL | 0.53 | -0.43 | † | 0.35 | -0.35 | † | † | † | |
| 3 | D014001 | 0.81 | 0.24 | 0.26 | † | † | † | † | † | |
| 4 | D0222CL | 0.66 | 0.21 | † | † | † | † | † | † | |
| 5 | D023001 | 0.69 | 1.38 | † | † | † | † | † | † | |
| 6 | D0068CL | 0.75 | -1.17 | † | -0.05 | 0.19 | -0.14 | † | † | |
| 7 | D0069CL | 0.81 | -0.99 | † | † | † | † | † | † | |
| 8 | D007001 | 1.05 | -0.91 | † | † | † | † | † | † | |
| 9 | D007101 | 0.85 | -1.08 | † | 1.41 | -1.41 | † | † | † | |
| T9 | 1 | D007201 | 0.50 | -0.68 | † | 0.89 | -0.38 | -0.51 | † | † |
| 2 | D007301 | 0.38 | -1.58 | † | -1.00 | 1.00 | † | † | † | |
| 3 | D0074CL | 0.35 | -0.85 | † | 1.29 | -1.29 | † | † | † | |
| 4 | D0075CL | 0.39 | -0.47 | † | -0.18 | 0.18 | † | † | † | |
| 5 | D021801 | 0.93 | -1.98 | † | † | † | † | † | † | |
| 6 | D021802 | 0.78 | 0.30 | † | † | † | † | † | † | |
| 7 | D0213CL | 0.56 | -0.79 | † | -0.23 | 0.23 | † | † | † | |
| 8 | D014601 | 0.59 | -0.78 | † | † | † | † | † | † | |
| 9 | D019501 | 1.39 | 0.43 | 0.22 | † | † | † | † | † | |
| 10 | D019502 | 0.64 | 0.33 | 0.17 | † |
† | † | † | † | |
| 11 | D018901 | 0.95 | 0.75 | 0.19 | † | † | † | † | † | |
| 12 | D015601 | 1.22 | 1.16 | 0.24 | † | † | † | † | † | |
| T10 | 1 | D019101 | 0.37 | -1.21 | 0.19 |
† | † | † | † | † |
| 2 | D019102 | 0.98 | -1.36 | 0.16 | † | † | † | † |
† | |
| 3 | D022601 | 0.55 | -0.46 | † | 0.32 | -0.32 | † | † |
† | |
| 4 | D0186CL | 0.62 | 0.28 | † | † | † | † | † | † | |
| 5 | D014101 | 0.79 | 1.20 | 0.20 | † | † | † | † |
† | |
| 6 | D0234CL | 0.35 | 2.41 | † | 1.97 | -1.97 | † | † |
† | |
| 7 | D0185CL | 0.26 | -0.33 | † | -1.76 | 1.76 | † | † |
† | |
| 8 | D018701 | 0.95 | 1.86 | 0.09 |
† | † |
† | † |
† | |
| 9 | D0076CL | 0.49 | -2.38 | † | -1.48 | 1.48 |
† |
† |
† | |
| 10 | D0077CL | 0.55 | -1.83 | † |
† |
† |
† |
† |
† | |
| 11 | D0078CL | 0.72 | -0.59 | † |
† |
† |
† |
† |
† | |
| 13 | D008101 | 0.50 | -0.11 | † | -0.36 | 0.36 |
† |
† |
† | |
| T12 | 1 | D013901 | 0.53 | -1.56 | † |
† |
† |
† |
† |
† |
| 2 | D013801 | 1.14 | -0.32 | 0.35 |
† |
† |
† |
† |
† | |
| 3 | D013802 | 0.52 | 0.65 | † | -0.77 | 0.77 |
† |
† |
† | |
| 4 | D018301 | 1.18 | 1.30 | 0.18 |
† |
† |
† |
† |
† | |
| 5 | D0089CL | 0.32 | -1.05 | † | 1.33 | -0.12 | -0.99 | 0.33 | -0.55 | |
| 6 | D009001 | 0.56 | 0.54 | † | 0.68 | -0.68 |
† |
† |
† | |
| 7 | D009101 | 0.77 | -0.79 | † |
† |
† |
† |
† |
† | |
| 8 | D009201 | 0.79 | -0.15 | † |
† |
† |
† |
† |
† | |
| 9 | D0093CL | 0.52 | -0.20 | † | 0.93 | -0.13 | -0.80 |
† |
† | |
| T13 | 1 | D0094CL | 0.35 | -5.09 | † |
† |
† |
† |
† |
† |
| 2 | D0095CL | 0.57 | -0.88 | † |
† |
† |
† |
† |
† | |
| 3 | D009601 | 0.71 | 0.42 | † |
† |
† |
† |
† |
† | |
| 4 | D0097CL | 0.20 | -0.03 | † | 1.64 | -1.64 |
† |
† |
† | |
| 5 | D009801 | 0.75 | 0.42 | † |
† |
† |
† |
† |
† | |
| 6 | D018001 | 0.41 | -1.46 | † |
† |
† |
† |
† |
† | |
| 7 | D021001 | 1.05 | -0.05 | 0.20 |
† |
† |
† |
† |
† | |
| 8 | D0159CL | 0.37 | -0.07 | † | 2.15 | -2.15 |
† |
† |
† | |
| 9 | D0223CL | 0.48 | 0.26 | † | -0.55 | 0.55 |
† |
† |
† | |
| 10 | D0162CL | 0.21 | 0.59 | † | -1.25 | 1.25 |
† |
† |
† | |
| 11 | D022401 | 0.93 | 1.37 | † |
† |
† |
† |
† |
† | |
| T14 | 1 | D014801 | 0.68 | -0.56 | 0.15 |
† |
† |
† |
† |
† |
| 2 | D019201 | 1.03 | 0.27 | 0.19 |
† |
† |
† |
† |
† | |
| 3 | D0151CL | 0.38 | -1.61 | † |
† |
† |
† |
† |
† | |
| 4 | D0184CL | 0.51 | -0.17 | † | 0.58 | -0.58 |
† |
† |
† | |
| 5 | D016501 | 0.50 | 0.67 | 0.17 |
† |
† |
† |
† |
† | |
| 6 | D016701 | 0.29 | 0.14 | † | -3.86 | 3.86 |
† |
† |
† | |
| 7 | D0167CL | 0.53 | 0.58 | † | 0.84 | -0.84 |
† |
† |
† | |
| 8 | D0099CL | 0.83 | -1.19 | † | 0.67 | -0.67 |
† |
† |
† | |
| 9 | D0100CL | 0.86 | -1.51 | † | 0.80 | -0.80 |
† |
† |
† | |
| 10 | D0101CL | 1.06 | -1.77 | † | 0.22 | -0.22 |
† |
† |
† | |
| 11 | D010201 | 0.77 | -0.19 | † | 0.94 | -0.05 | -0.89 |
† |
† | |
| 12 | D010301 | 0.68 | -0.17 | † | 1.21 | -0.57 | -0.64 |
† |
† | |
| T15 | 1 | D010401 | 0.83 | -0.76 | 0.15 |
† |
† |
† |
† |
† |
| 3 | D010601 | 0.66 | 0.15 | † | 0.43 | -0.43 |
† |
† |
† | |
| 4 | D010701 | 0.66 | -1.45 | † | -0.15 | 0.15 |
† |
† |
† | |
| 5 | D010801 | 0.61 | -0.26 | † |
† |
† |
† |
† |
† | |
| 6 | D010901 | 0.57 | -1.42 | † | 0.52 | -0.52 |
† |
† |
† | |
| 7 | D014301 | 0.37 | -0.73 | † | 0.17 | -0.17 |
† |
† |
† | |
| 8 | D014302 | 0.49 | -1.68 | 0.22 |
† |
† |
† |
† |
† | |
| 9 | D014201 | 0.83 | 1.15 | 0.21 |
† |
† |
† |
† |
† | |
| 10 | D0142CL | 0.32 | 1.06 | † |
† |
† |
† |
† |
† | |
| 11 | D019901 | 0.96 | 0.85 | 0.23 |
† |
† |
† |
† |
† | |
| T16 | 1 | D0179CL | 0.48 | -0.57 | † | 0.43 | -0.43 |
† |
† |
† |
| 2 | D017905 | 0.93 | -0.86 | † |
† |
† |
† |
† |
† | |
| 3 | D015401 | 0.75 | -0.49 | † |
† |
† |
† |
† |
† | |
| 4 | D015402 | 0.78 | -1.68 | † |
† |
† |
† |
† |
† | |
| 5 | D0110CL | 0.45 | -0.68 | † | -1.29 | 1.29 |
† |
† |
† | |
| 6 | D011101 | 0.62 | -0.52 | † | -1.01 | 1.01 |
† |
† |
† | |
| 7 | D011201 | 0.47 | -0.14 | † |
† |
† |
† |
† |
† | |
| 8 | D011301 | 0.52 | 0.52 | † |
† |
† |
† |
† |
† | |
| 9 | D011401 | 0.53 | 0.86 | † | 1.08 | -1.08 |
† |
† |
† | |
| 10 | D011501 | 0.47 | 1.12 | † | 1.55 | -1.55 |
† |
† |
† | |
| T17 | 1 | D0116CL | 0.65 | -1.51 | † |
† |
† |
† |
† |
† |
| 2 | D0117CL | 0.22 | -0.41 | † | 0.60 | -4.57 | 3.96 |
† |
† | |
| 3 | D011716 | 0.51 | -0.27 | † | 1.34 | -1.34 |
† |
† |
† | |
| 4 | D0118CL | 0.57 | -1.98 | † |
† |
† |
† |
† |
† | |
| 5 | D0119CL | 0.43 | -0.04 | † |
† |
† |
† |
† |
† | |
| 6 | D0120CL | 0.81 | -2.64 | † |
† |
† |
† |
† |
† | |
| 7 | D0121CL | 0.38 | -2.40 | † | 1.52 | -1.52 |
† |
† |
† | |
| 8 | D0122CL | 0.92 | -1.19 | † |
† |
† |
† |
† |
† | |
| 9 | D019601 | 0.65 | -0.89 | † |
† |
† |
† |
† |
† | |
| 10 | D015501 | 1.02 | -0.06 | 0.26 |
† |
† |
† |
† |
† | |
| 11 | D017301 | 0.54 | 0.51 | 0.15 |
† |
† |
† |
† |
† | |
| 12 | D020101 | 0.84 | 0.63 | 0.25 |
† |
† |
† |
† |
† | |
| 13 | D0212CL | 0.73 | 0.93 | † | 1.12 | -1.12 |
† |
† |
† | |
| 14 | D0216CL | 0.41 | 0.33 | † |
† |
† |
† |
† |
† | |
| T20 | 1 | D022001 | 0.66 | -1.75 | 0.20 |
† |
† |
† |
† |
† |
| 2 | D016301 | 0.41 | -2.10 | 0.20 |
† |
† |
† |
† |
† | |
| 3 | D019001 | 0.77 | -0.83 | 0.17 |
† |
† |
† |
† |
† | |
| 4 | D016901 | 0.86 | -0.40 | 0.23 |
† |
† |
† |
† |
| |
| 5 | D018201 | 0.60 | -0.88 | † |
† |
† |
† |
† |
† | |
| 6 | D018801 | 1.08 | 0.21 | † |
† |
† |
† |
† |
† | |
| 7 | D018802 | 0.78 | 0.24 | † |
† |
† |
† |
† |
† | |
| 8 | D018803 | 0.98 | -0.41 | † |
† |
† |
† |
† |
† | |
| 9 | D0174CL | 0.84 | 0.75 | † |
† |
† |
† |
† |
† | |
| 10 | D017409 | 0.73 | -0.55 | † |
† |
† |
† |
† |
† | |
| 11 | D013201 | 1.08 | -0.38 | 0.17 |
† |
† |
† |
† |
† | |
| 12 | D0133CL | 0.46 | -1.70 | † | 0.00 | 0.00 |
† |
† |
† | |
| 13 | D0134CL | 0.67 | -1.05 | † | 0.55 | -0.55 |
† |
† |
† | |
| 14 | D013501 | 0.81 | 0.68 | 0.10 |
† |
† |
† |
† |
† | |
| 15 | D013601 | 0.84 | 0.23 | 0.12 |
† |
† |
† |
† |
† | |
| 16 | D013701 | 1.07 | 0.86 | † |
† |
† |
† |
† |
† | |
| T21 | 1 | D016801 | 0.41 | -1.79 | 0.23 |
† |
† |
† |
† |
† |
| 2 | D0232CL | 0.28 | -1.53 | † | -1.12 | 1.12 |
† |
† |
† | |
| 3 | D023101 | 0.37 | -0.92 | † | -1.33 | 1.33 |
† |
† |
† | |
| 4 | D019801 | 0.43 | -1.04 | † |
† |
† |
† |
† | † | |
| 5 | D019802 | 0.45 | -0.48 | † |
† |
† |
† |
† | † | |
| 6 | D016101 | 0.70 | -0.18 | † |
† |
† |
† |
† |
† | |
| 7 | D016102 | 0.69 | 0.22 | † |
† |
† |
† |
† |
† | |
| 8 | D017101 | 0.43 | 0.63 | † | 0.02 | -0.02 |
† |
† | † | |
| 9 | D020601 | 0.58 | 1.02 | † | † | † | † | † | † | |
| 10 | D020602 | 0.61 | 0.65 | † | † | † | † | † | † | |
| 11 | D020603 | 1.00 | 1.78 | 0.24 | † | † | † | † | † | |
| †
Not applicable; c parameters are not estimated for the two-parameter logistic 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), 2018 Technology and Engineering Literacy (TEL) Assessment. | ||||||||||
Last updated 02 November 2022 (SK)
