NAEP tdw - Overall Descriptive Statistics for Items as Defined After Scaling, Grade 4 Meaning Vocabulary Combined National and State Assessment, by Block: 2013

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 4 Meaning Vocabulary Combined National and State Assessment, by Block: 2013

NAEP Technical DocumentationOverall block-level descriptive statistics for items as defined after scaling, grade 4 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. ²²The 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	5	5	5	5	20
Unweighted sample size¹	8,700	8,600	8,700	8,600	35,100
Weighted average item score	.60	.56	.70	.53	.58
Weighted average polyserial	.81	.76	.90	.76	.61
Weighted alpha reliability	.59	.54	.72	.56	†
Weighted proportion of students attempting last item²	.99	.98	.99	.98	†

Last updated 21 May 2017 (DC)

Printer-friendly Version