Understanding the influence of multisite evaluation requires careful consideration of cultural context. The author illustrates dimensions of influence and culture with excerpts from four National Science Foundation evaluation case studies and summarizes what influence teaches everyone about culture and what culture teaches everyone about…

Introduction: Critical appraisal is a crucial aspect of evidence-based practice. In order to determine whether research is valid, reliable and applicable, the evidence-based practice process advocates that published research be critically appraised. Between 2006 and 2008, the journal Evidence Based Library and Information Practice published 101…

Culturally adapted psychotherapy has potential to improve psychotherapy outcomes for ethnic and racial minorities and solve a decades-long conundrum that alteration of specific ingredients does not improve psychotherapy outcomes. Adaptation of the cultural explanation of illness, known as the anthropological Myth in universal healing practices…

This study addresses the extent to which insecure and disorganized attachments increase risk for externalizing problems using meta-analysis. From 69 samples (N = 5,947), the association between insecurity and externalizing problems was significant, d = 0.31 (95% CI: 0.23, 0.40). Larger effects were found for boys (d = 0.35), clinical samples (d =…

In this article, the authors outline methods for using fixed and random effects power analysis in the context of meta-analysis. Like statistical power analysis for primary studies, power analysis for meta-analysis can be done either prospectively or retrospectively and requires assumptions about parameters that are unknown. The authors provide…

We report the results of meta-analyses on 3 types of free-response study: (a) ganzfeld (a technique that enhances a communication anomaly referred to as "psi"); (b) nonganzfeld noise reduction using alleged psi-enhancing techniques such as dream psi, meditation, relaxation, or hypnosis; and (c) standard free response (nonganzfeld, no noise…

Four overlap methods for quantitatively synthesizing single-subject data were compared to visual analysts' judgments. The overlap methods were percentage of nonoverlapping data, pairwise data overlap squared, percentage of data exceeding the median, and percentage of data exceeding a median trend. Visual analysts made judgments about 160 A-B data…

We examined the degree of dependence between standardized-mean-difference effect sizes in multiple-treatment studies in meta-analysis in terms of the correlation formula provided by Gleser and Olkin (1994). To explore the impact of group size and the values of the true multiple-treatment effect sizes, we simplified the formula for the correlation…

The validity and reliability of the Technological Pedagogical Content Knowledge (TPACK) framework to measure the extent to which teachers can teach with technology, hinges on the ability to aggregate results across empirical studies. We synthesized mean difference effect sizes resulting from university classroom studies, which used a survey of…

Youth aggression has been associated with negative parenting practices, but previous research about this association has mainly focused on physical and verbal aggression. Because more subtle forms of aggression are considered at least as harmful as their physical and verbal counterparts, there is a growing scientific interest in parenting…

Lower socioeconomic status (SES) is widely accepted to have deleterious effects on the well-being and development of children and adolescents. However, rigorous meta-analytic methods have not been applied to determine the degree to which SES supports or limits children's and adolescents behavioural, cognitive and language development. While…

This article summarises findings from systematic reviews of research on primary and secondary mathematics, primary and secondary reading, and programmes for struggling readers. All reviews used a common set of procedures, requiring comparisons with control groups and duration of at least 12 weeks. Across hundreds of qualifying studies, a clear…

We re-examined the effect of teaching and learning with technology on student cognitive and affective outcomes using the meta-analytic technique. Screening studies obtained from an electric search of databases such as PsyInfo and ERIC resulted in 58 studies (1997-2011). Overall, effect sizes were small to moderate across the cognitive and…

Individuals with autism spectrum disorder (ASD) often struggle with features of adult life, including obtaining and maintaining gainful employment. Many factors seem to contribute to this issue, such as: (a) access to financial resources, (b) interaction between the unique characteristics of ASD and employment settings, and (c) curriculum and…

The study reviewed 17 years of research extending the work of Lovell and Kosten (2000) on student affairs competencies important for professional preparation and practice. A meta-analysis was used to organize and present data on 22 articles concerned with knowledge, skills, dispositions, curriculum, multicultural competency, and professional…