The fail-safe N is typically a "what if" analysis applied to studies rather than to a single study. This statistical procedure provides information regarding the stability of a meta-analysis by demonstrating how many nil-null articles would be needed to change the statistically significant results to a statistically nonsignificant…

Focuses on meta-analysis in educational research. Contends that, if significant meta-analysis results are overrepresented through selective sampling, hucksterism in form of sampling bias exists. Explains use of follow-up test, the fail-safe N. Includes tables constructed to assist researchers and practitioners to estimate, without calculation,…

This article provides a meta-analysis of 38 studies of J. E. Helms and R. T. Carter's (1990) White Racial Identity Attitude Scale. Systematic measurement errors are implicated as influences on the measure's reliability and validity. (Author/MKA)

Violence risk assessment has advanced considerably in the last 20 years. In the 1980s, leading professionals questioned the very possibility of valid violence risk assessments; now, many of the major risk factors have been identified, and professional debate focuses on how best to combine these risk factors into meaningful evaluations. An…

The emergence of the European Standards and Guidelines (ESG) for Quality Assurance has been seen as an important step towards realising the European Higher Education Area by creating more transparency and accountability in the area of quality assurance. The ESG also include standards as to how quality assurance agencies should be reviewed. In a…

Meta-analysis procedures were employed to synthesize findings of research for improving reading comprehension of students with learning disabilities published in the decade following previous meta-analytic investigations. Forty studies, published between 1995 and 2006, were identified and coded. Nearly 2,000 students served as participants.…

The extent to which the influences of family-systems intervention practices could be traced to variations in parent-child interactions and child development was investigated by meta-analytic structural equation modeling (MASEM). MASEM is a procedure for producing a weighted pooled correlation matrix and fitting a structural equation model to the…

A search of the ERIC database, Academic Search Premier, and a review of literature suggests that meta-analysis is ignored by career and technical education (CTE) researchers, a situation that is regrettable but remediable. The purpose of this paper was to provide CTE researchers and consumers with selected procedures and guidelines for conducting…

Research has suggested that short-term memory and working memory (as measured by simple and complex span tasks, respectively) are separate constructs that are differentially related to higher order cognitive abilities. This claim is critically evaluated by reviewing research that has compared simple and complex span tasks in both experimental and…

Reliability generalization studies have provided estimates of the mean reliability coefficients and examined factors that explain the variability in the reliability estimates across studies for many different tests and measures. Different authors have used different data analyses to do such meta-analyses, and little research has addressed whether…

Good quantitative evidence does not require large, aggregate group designs. The authors describe ground-breaking work in managing the conceptual and practical demands in developing meta-analytic strategies for single subject designs in an effort to add to evidence-based practice. (Contains 2 figures.)

This article proposes that a complete account of cognitive evolution may have to accommodate a domain-general source of variance in mental abilities accounting for differences among primate taxa. Deaner, van Schaik, and Johnson [Deaner, R.O., van Schaik, C.P. and Johnson, V.E. (2006). Do some taxa have better domain-general cognition than others?…

This article presents the discussion between John Gravois and John B. Lee concerning the problems in measuring bias. John B. Lee is president and founder of JBL Associates, Inc., a prominent higher-education-research firm. He is retained by the American Federation of Teachers to assess the research that purports to find a liberal predominance and…

This meta-analysis synthesizes experimental and quasi-experimental research on instruction that enhances the mathematics performance of K-12 students with learning disabilities. It reports the findings from this synthesis, discusses the implications for practice, and suggests next steps for research and professional development efforts in this…

Technical terms such as "meta-analysis," research synthesis," and "effect size" may sound alien to practitioners in the field of education. Due to limited knowledge on meta-analysis among educators, the results of meta-analyses seldom translate from research to classroom practice--even though meta-analyses may provide valuable information on how…