This comprehensive review of Social Story[TM} literature included (a) a descriptive review, (b) an analysis of research quality, and (c) a meta-analysis using percentage of nonoverlapping data. In the review, 28 studies were included; 18 were included in the meta-analysis. Descriptive results highlighted information on participants, dependent…

Robin Lakoff proposed that women are more likely than men to use tentative speech forms (e.g., hedges, qualifiers/disclaimers, tag questions, intensifiers). Based on conflicting results from research testing Lakoff's claims, a meta-analysis of studies testing gender differences in tentative language was conducted. The sample included 29 studies…

The empirical literature investigating general and domain-specific self-concepts of adults with learning disabilities was examined using meta-analytic techniques. Eight inclusion criteria were developed to evaluate this literature and led to the inclusion of 22 studies. Results indicated that adults with learning disabilities reported lower…

In response to rising rates of firearms violence that peaked in the mid-1990s, a wide range of policy interventions have been developed in an attempt to reduce violent crimes committed with firearms. Although some of these approaches appear to be effective at reducing gun violence, methodological variations make comparing effects across program…

The purpose of this study was to perform a comprehensive analysis of 830 articles published in the "Journal of Career Development" ("JCD") between 1972 and 2007 and provide a chronicle of the publication trends since the journal's establishment. The analysis focused on six main areas (e.g., authors and institutions, type of article, major…

Research on bystander intervention has produced a great number of studies showing that the presence of other people in a critical situation reduces the likelihood that an individual will help. As the last systematic review of bystander research was published in 1981 and was not a quantitative meta-analysis in the modern sense, the present…

A meta-analysis was conducted to determine relationships between team training and team effectiveness. Results from the 21 studies provided evidence that training is positively related to team effectiveness and effectiveness in five outcome categories: affective, cognitive, subjective task-based skill, objective task-based skill, and teamwork…

Objective: To examine the results of prison privatization. Method: In an effort to provide an empirical base from which decisions about privatization might be made, we conducted a meta-analysis of reports on head-to-head comparisons between an identifiable privately managed and publicly managed prison(s). Results: Our search identified 12 studies.…

The present meta-analysis examines the effect of grade retention on academic outcomes and investigates systemic sources of variability in effect sizes. Using multilevel modeling (MLM), the authors investigate characteristics of 207 effect sizes across 22 studies published between 1990 and 2007 at two levels: the study (between) and individual…

A meta-analysis encompassing all studies evaluating the impact of the Triple P-Positive Parenting Program on parent and child outcome measures was conducted in an effort to identify variables that moderate the program's effectiveness. Hierarchical linear models (HLM) with three levels of data were employed to analyze effect sizes. The results (N =…