The estimate-and-subtract method for eliminating threats to validity is described. It is argued that the method is superior to the use of no-difference findings for this purpose. Two ways of improving the no-difference findings are presented. (TJH)

Investigates the presence of clustering structure in a document collection and the influence of the presence of clustering structure on the success of cluster-based retrieval. Term-weight and similarity thresholds are discussed, empirical and statistical significance are considered, and indexing exhaustivity for document representation is…

Examined the historical growth in the popularity of statistical significance testing using a random sample of data from 12 American Psychological Association journals. Results replicate and extend findings from a study that used only one such journal. Discusses the role of statistical significance testing and the use of replication and…

The Hubbard and Ryan article is a little ingenuous in its implications for action. Both meta-analyses and replication have problems of their own; each requires careful attention. Good measurement emphasizes proper sampling techniques and using whatever means possible to analyze data. (SLD)

Agrees with R. Hubbard and P. Ryan that statistical significance testing has had a negative impact in that some users have closed their minds to alternative approaches to conducting research. In marketing, the alternatives are not completely satisfactory, however, and researchers are likely to continue to rely on statistical significance testing.…

The purpose of this article was to extend the research pertaining to the idea of a statistically significant exact replication (SSER) method published recently in the Mid-Western Educational Researcher. The current study continues the idea of SSER and provides researchers with a software program that will calculate easily the SSER value when there…

The purpose of this quantitative dissertation was to examine factors determining self-regulation of pre-service physical education teacher education (PETE) students. There is a gap in the literature on self-regulatory capabilities of pre-service teachers and how they self-regulate their learning. Self-regulation theory, the foundation of this…

The Office of Management and Budget requested that the Institute of Education Sciences (IES) oversee an independent impact evaluation of the federal Student Mentoring Program, and in 2005 IES contracted with Abt Associates and its team of subcontractors (Branch Associates, Moore and Associates, and the Center for Resource Management) to conduct…

This non-experimental, correlational study looked at the relationship between bureaucratic structures in middle and high schools in bringing about change in individual teacher classroom instructional practices through the centralized directive of membership in a professional learning community. Using a continuum of bureaucratic structure, from…

It is tempting to assume that we know what our parents, our community, and our employees want from our schools. It is comforting to think that we know what they support. It is also dangerous. This article encourages school systems to let go of assumptions and to start asking the important questions that will lead school boards and administrators…

The purpose of this research study was to explore what effect instruction in metacognitive strategy (MS) use had on student achievement in a hybrid developmental English course at a community college. The study examined whether the addition of teacher-led or peer-led instruction in MS use would result in improved writing ability for the student…

The need to increase US competitiveness in the world economy is a driving factor in the recent push to internationalize university campuses across the country. Technical and subject area expertise are no longer sufficient to succeed in the 21st-century global workplace. Intercultural competence is becoming more valued as part of the desired…

Written by a social worker for social work students, this is a nuts and bolts guide to statistics that presents complex calculations and concepts in clear, easy-to-understand language. It includes numerous examples, data sets, and issues that students will encounter in social work practice. The first section introduces basic concepts and terms to…

In this study, the reasons why men and women behave differently in leadership roles in schools were investigated because of recent research on the indirect nature of the school principal's impact on learning and on gender differences in leadership behaviors. Practicing principals (109 males, 172 females) from two Southwestern states were surveyed…

This study was designed to examine the impact NCLB defined teacher-quality variables (1) major/minor in mathematics, (2) highest academic degree, (3) type of teaching certificate, (4) years taught mathematics (NCLB, 2001) on the mathematics average scale scores of eighth-grade students. The study used a secondary analysis of the 2007 National…