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Table of Contents | Search Technical Documentation | References
NAEP Analysis and Scaling → Initial Activities → Classical Item Analysis → Overall Descriptive Statistics for Items as Defined After Scaling, Grade 12 Meaning Vocabulary Combined National and State Assessment, by Block: 2013
| Statistic | Block R14 | Block R15 | Block R16 | Block R17 | Embedded items | |
|---|---|---|---|---|---|---|
| † Not applicable. 11 The unweighted sample associated with the embedded items is the average unweighted sample across all embedded meaning vocabulary items. 22 The Weighted proportion of students attempting last item is equal to 1 - (Percent not responding to last item/100). NOTE: The meaning vocabulary assessment includes multiple-choice items only.The embedded items column contains information about only those meaning vocabulary items embedded within the 25-minute reading comprehension blocks. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2013 Reading Assessment. | ||||||
| Number of scaled items | 6 | 5 | 5 | 5 | 27 | |
| Unweighted sample size1 | 3,500 | 3,500 | 3,000 | 3,000 | 6,500 | |
| Weighted average item score | .67 | .69 | .60 | .65 | .72 | |
| Weighted average polyserial | .74 | .77 | .76 | .77 | .63 | |
| Weighted alpha reliability | .54 | .48 | .49 | .51 | † | |
| Weighted proportion of students attempting last item2 | 1.00 | 1.00 | 1.00 | 1.00 | † | |
Last updated 21 May 2017 (DC)