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NAEP Technical DocumentationComparisons of Means and Percentiles of Scores and Transformed Provisional Scores, Grade 8 Technology and Engineering Literacy (TEL) National Assessment: 2018
Original estimates are based on previous assessment data and previous assessment scaling results, transformed to the reporting metric using the transformation constants identified during the analysis of the previous assessment data. Provisional estimates are based on previous assessment data and current assessment scaling results. Prior to transformation, provisional estimates are on the theta metric specified by the scaling program. The original and provisional estimates for the linking sample are used to find the transformation constants necessary to place the current assessment scale scores on the scale used to report previous assessment scale scores. The transformed provisional estimates are based on previous assessment data and current assessment scaling results, transformed to the reporting metric using the transformation constants calculated from the original and provisional estimates for the linking sample. If the transformation constants are correct, the original and transformed provisional means should be the same.
| Scale | Statistic | Original 2014 estimate | 2014-transformed provisional estimate | Difference between the provisional estimate and the original estimate |
|---|---|---|---|---|
| Univariate | Mean | 150.00 | 150.00 | # |
| 10th percentile | 103.68 | 105.87 | 2.19 | |
| 25th percentile | 127.26 | 128.71 | 1.45 | |
| 50th percentile | 152.09 | 152.51 | 0.42 | |
| 75th percentile | 174.72 | 173.94 | -0.78 | |
| 90th percentile | 193.32 | 190.37 | -2.94 | |
| Technology and society | Mean | 150.00 | 149.85 | -0.15 |
| 10th percentile | 103.90 | 107.82 | 3.93 | |
| 25th percentile | 126.85 | 129.49 | 2.65 | |
| 50th percentile | 151.55 | 152.64 | 1.09 | |
| 75th percentile | 174.63 | 172.88 | -1.76 | |
| 90th percentile | 193.90 | 187.54 | -6.35 | |
| Design and systems | Mean | 150.00 | 150.15 | 0.15 |
| 10th percentile | 104.25 | 110.25 | 6.00 | |
| 25th percentile | 127.59 | 131.12 | 3.54 | |
| 50th percentile | 151.79 | 152.47 | 0.68 | |
| 75th percentile | 174.31 | 171.78 | -2.53 | |
| 90th percentile | 193.40 | 186.39 | -7.00 | |
| Information and communication technology | Mean | 150.00 | 150.10 | 0.10 |
| 10th percentile | 104.06 | 109.23 | 5.17 | |
| 25th percentile | 127.46 | 130.09 | 2.63 | |
| 50th percentile | 152.02 | 153.03 | 1.01 | |
| 75th percentile | 174.48 | 172.51 | -1.97 | |
| 90th percentile | 193.20 | 187.44 | -5.77 | |
| Communicating and collaborating | Mean | 150.00 | 149.99 | -0.01 |
| 10th percentile | 104.07 | 109.71 | 5.64 | |
| 25th percentile | 127.32 | 130.95 | 3.63 | |
| 50th percentile | 151.67 | 152.96 | 1.29 | |
| 75th percentile | 174.45 | 171.91 | -2.53 | |
| 90th percentile | 193.53 | 185.96 | -7.57 | |
| Developing solutions and achieving goals | Mean | 150.00 | 149.98 | -0.02 |
| 10th percentile | 103.89 | 106.95 | 3.06 | |
| 25th percentile | 127.22 | 128.82 | 1.60 | |
| 50th percentile | 151.98 | 152.93 | 0.95 | |
| 75th percentile | 174.57 | 173.25 | -1.31 | |
| 90th percentile | 193.46 | 189.50 | -3.96 | |
| Understanding technological principles | Mean | 150.00 | 150.21 | 0.21 |
| 10th percentile | 104.04 | 110.52 | 6.48 | |
| 25th percentile | 127.13 | 130.98 | 3.85 | |
| 50th percentile | 151.57 | 152.65 | 1.08 | |
| 75th percentile | 174.52 | 172.02 | -2.49 | |
| 90th percentile | 193.78 | 186.51 | -7.27 | |
|
# Rounds to zero. NOTE: In 2018, grades 4 and 12 were not assessed. The differences are based on the unrounded estimates. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2014 and 2018 Technology and Engineering Literacy (TEL) Assessments. | ||||
Last updated 02 November 2022 (SK)