A meta-analysis of the relationship between class attendance in college and college grades reveals that attendance has strong relationships with both class grades (k = 69, N = 21,195, p = 0.44) and GPA (k = 33, N = 9,243, p = 0.41). These relationships make class attendance a better predictor of college grades than any other known predictor of…

The National Assessment of Educational Progress reveals that 37 percent of U.S. fourth graders fail to achieve basic levels of reading achievement. In 1997, the U.S. Congress asked that a review of research be conducted to determine what could be done to improve reading and writing achievement. The resulting "Report of the National Reading…

There has been significant interest in the role of anxiety sensitivity (AS) in the anxiety disorders. In this meta-analysis, we empirically evaluate differences in AS between anxiety disorders, mood disorders, and nonclinical controls. A total of 38 published studies (N = 20,146) were included in the analysis. The results yielded a large effect…

This meta-analysis assesses the effectiveness of volunteer tutoring programs for improving the academic skills of students enrolled in public schools Grades K-8 in the United States and further investigates for whom and under what conditions tutoring can be effective. The authors found 21 studies (with 28 different study cohorts in those studies)…

This meta-analysis examines to what extent interactive storybook reading stimulates two pillars of learning to read: vocabulary and print knowledge. The authors quantitatively reviewed 31 (quasi) experiments (n = 2,049 children) in which educators were trained to encourage children to be actively involved before, during, and after joint book…

The study used meta-analysis techniques to examine the effectiveness of intervention strategies for children with cerebral palsy. An examination of existing literature on meta-analysis revealed that techniques are available to accommodate a wide variety of research designs and data. Next, the percentage of studies purporting to address an…

Conducted meta-analysis of 108 well-designed outcome studies using 4- through 18-year-old subjects to examine effectiveness of psychotherapy with children and adolescents. Overall, findings revealed significant, durable effects of treatment that differed somewhat with client age and treatment method but which were reliably greater than zero for…

The Meta-Analysis Effect Size Calculator provides the user with many different ways to calculate an effect size depending on the information available in the original research report. In addition, the program computes an unbiased estimate of effect size. (Author)

Evaluated the effectiveness of paradoxical interventions in psychotherapy, in a meta-analysis of 12 data sets. Found that paradoxical interventions were as effective as, but not more effective than, the typical treatment made except for one month after treatment termination and with more severe cases, when it showed relatively greater…

The paper explores the conceptual bases of the controversy over meta analysis and computes it with traditional research on four dimensions: (1) scientific rigor, (2) detecting small effects, (3) problems of oversimplification, and (4) potential policy impact. It is argued that choice of procedures should be determined by the specific purpose of a…

Examined generalizability of treatment studies by comparing solicited and nonsolicited patient groups treated or studied in clinical settings. Findings suggest it may be possible to generate comparable samples in terms of pretreatment symptomatology, however, data are too limited to permit conclusions regarding generalizability of treatment…

As meta-analytic studies have become essential in educational research, resampling methods have matured and are supported by an in-depth theoretical and applied literature base. The objective of this paper is to assist researchers in applying resampling methods to the results of meta-analysis. The rationale for resampling methods is reviewed, and…

The practical significance, usefulness, and generalizability of research have for years hinged on a finding of statistical significance. Voices of reform have called for the use of effect sizes, confidence intervals, and meta-analytic synthesis of research as a way to judge the practical significance and generalizability of a discovery. This paper…

States that argumentative explicitness is acknowledged as a normative ideal in the practice of argument. Addresses one facet of the question of whether argumentative explicitness inevitably sacrifices instrumental success, by offering a meta-analytic review of the persuasive effects associated with degree of articulation given to the advocate's…

The vote-counting method of research integration disregards sample size and important descriptive information. Meta-analysis allows for integration of vast amounts of information, standardizes measuring scales, and overcomes contradictory findings. Two objections to meta-analysis are inclusion of studies of poor quality and the issue of…