This study is a critical evaluation of the roles for coding and scoring of missing responses to multiple-choice items in educational tests. The focus is on tests in which the test-takers have little or no motivation; in such tests omitting and not reaching (as classified by the currently adopted operational rules) is quite frequent. Data from the…

In the context of Phase Four of the National Assessment of Educational Progress (NAEP) Science Attribute Study, this report includes a discussion of item attributes, an overview of the item attributes used in the study, some psychometric characteristics of the blocks analyzed, a general description of the rule-space methodology, the results…

The study described in this paper is part of an effort to improve understanding of the science assessment of the National Assessment of Educational Progress (NAEP). It involved the coding of all the items in the 1996 NAEP science assessments, which included 45 blocks (15 each for grades 4, 8, and 12) and over 500 items. Each of the approximately…