Cognitive tasks and concepts are used increasingly in schizophrenia science and treatment. Recent meta-analyses show that across a spectrum of research domains only cognitive measures distinguish a majority of schizophrenia patients from healthy people. Average effect sizes derived from common clinical tests of attention, memory, language, and…

This meta-analysis investigates differences between the effect sizes of physical punishment and alternative disciplinary tactics for child outcomes in 26 qualifying studies. Analyzing differences in effect sizes reduces systematic biases and emphasizes direct comparisons between the disciplinary tactics that parents have to select among. The…

Twenty peer-reviewed journal articles that described outcomes of interventions that took place in school settings and either focused on anger or included anger as a dependent variable were meta-analyzed. No differences in outcomes were found for group comparisons by school setting, special education status, entrance criteria, or treatment agents.…

A responsiveness-to-intervention (RTI) approach to diagnosing LD is a leading alternative to current practice. This study conducted a meta-analytic review of research on four existing large-scale RTI models and other models implemented for research. Twenty-four effect sizes and unbiased estimates of effect (UEE) were computed. Results found a…

The purpose of the present study is twofold: (a) to compare the validation of percentage of nonoverlapping data approach and percentage of data points exceeding the median of baseline phase (PEM) approach, and (b) to demonstrate application of the PEM approach in conducting a quantitative synthesis of single-subject research investigating the…

Introduction: This meta-analysis evaluates the effect of school programs targeting stress management or coping skills in school children. Methods: Articles were selected through a systematic literature search. Only randomized controlled trials or quasi-experimental studies were included. The standardized mean differences (SMDs) between baseline…

The research on response facilitation factors in mail surveys is reviewed, and background is developed to enable the comparison of results obtained by two analytic approaches, a descriptive analysis and a meta-analysis, using the same set of studies. Specific criteria for sample and methodology were applied to studies extracted from four CD-ROM…

The meta-analytic techniques of G. V. Glass (1976) and J. E. Hunter and F. L. Schmidt (1977) were compared through their application to three meta-analytic studies from education literature. The following hypotheses were explored: (1) the overall mean effect size would be larger in a Hunter-Schmidt meta-analysis (HSMA) than in a Glass…

The effectiveness of assessment centers in evaluating desirable criteria for the principalship is examined in this report, with a focus on the identification of the most effective evaluation criteria. This study explored a variety of factors in the preparation of school personnel for assessment, the actual National Association of Secondary School…

A general model is described which can be used to represent the four common types of meta-analysis: (1) estimation of effect size by combining study outcomes; (2) estimation of effect size by contrasting study outcomes; (3) estimation of statistical significance by combining study outcomes; and (4) estimation of statistical significance by…

Reported in this paper are the findings of five meta-analyses assessing the relationships among children's interpersonal cognitive problem-solving (ICPS) skills, training, and behavioral adjustment. Five hypotheses were examined: (1) Adjusted children score higher on ICPS measures than do nonadjusted children; (2) Children trained in ICPS skills…

Of 193 special education studies that included significant interaction effects based on a two-way analysis of variance design, only 9% interpreted the significant interaction consistent with the accurate explanation of a differential or joint effect. Instead, the cell means comparison procedure explained the interaction in 77% of the…

The purpose of this review paper is to conduct an extensive meta-analysis of the empirical literature on gender difference in the use of computer-mediated communication (CMC). Specifically, the questions that this research addresses are: 1) Are there gender differences in people's behaviors in relation to CMC? If yes, to what extent? 2) What…

Synthesized empirical findings on job satisfaction from the first 26 volumes of "Educational Administration Quarterly." Discovered 330 job satisfaction research hypotheses and 613 relational effect sizes. Performed meta-analyses for six hypotheses, finding the largest mean effect sizes for relationships between overall job satisfaction…

This study examines 103 meta-analyses related to educational achievement published over 10 years to produce a meta-synthesis. Various characteristics of the meta-analyses are summarized to produce a methodological profile of research, and effect sizes are synthesized to assess an educational productivity model. (SLD)