Results of two experiments involving 206 upper elementary school students supported the hypothesis that less-skilled readers suffer working memory deficits that contribute to comprehension problems independent of their problems in phonological coding. Results also suggest that constraints in an executive system may contribute to reading…

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…

The present study attempts to expand current question categorization schemes to identify question types that discriminate good learners from their peers in collaborative problem-solving groups. The study also explores the effects of person and task variables on students' question-asking behaviors in an effort to identify those that facilitate…