Type of contrast | Number of contrasts | Mean | Minimum | Maximum | Number of contrasts by proportion1 of variance explained | ||||
---|---|---|---|---|---|---|---|---|---|
0.00 - 0.70 | 0.70 - 0.80 | 0.80 - 0.90 | 0.90 - 0.95 | 0.95 - 1.00 | |||||
† Not applicable; Category does not exist. 1(Total Variance – Residual Variance)/Total Variance, where Total Variance consists of both sampling and measurement error variance. NOTE: NIES = National Indian Education Study; SD/ELL = Students with disabilities/English language learners. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2009 Reading Vocabulary Assessment. |
|||||||||
All contrasts | 272 | 0.90 | 0.63 | 1.00 | 19 | 16 | 64 | 74 | 99 |
Student questionnaire | 5 | 0.98 | 0.96 | 0.99 | 0 | 0 | 0 | 0 | 5 |
Major reporting variables | 69 | 0.94 | 0.87 | 1.00 | 0 | 0 | 13 | 25 | 31 |
Interaction between reporting variables | 198 | 0.88 | 0.63 | 1.00 | 19 | 16 | 51 | 49 | 63 |
Teacher questionnaire | † | † | † | † | † | † | † | † | † |
School questionnaire | † | † | † | † | † | † | † | † | † |
NIES questionnaire | † | † | † | † | † | † | † | † | † |
SD/ELL questionnaire | † | † | † | † | † | † | † | † | † |