We conducted a meta-analysis to investigate reading-writing relations. Beyond the overall relation, we systematically investigated moderation of the relation as a function of linguistic grain size (word reading and spelling versus reading comprehension and written composition), measurement of reading comprehension (e.g., multiple choice,…

Project based learning instructional strategies have been used in the K-12 and college setting to activate learning and engagement. Problem Based Learning allows students to learn by taking on real world problems. Research and literature shows that Project Based Learning can increase collaboration, problem-solving skills, communication,…

Background: Multivariate meta-analysis (MVMA) jointly synthesizes effects for multiple correlated outcomes. The MVMA model is potentially more difficult and time-consuming to apply than univariate models, so if its use makes little difference to parameter estimates, it could be argued that it is redundant. Methods: We assessed the applicability…

Network meta-analysis (NMA) uses both direct and indirect evidence to compare the efficacy and harm between several treatments. Structural equation modeling (SEM) is a statistical method that investigates relations among observed and latent variables. Previous studies have shown that the contrast-based Lu-Ades model for NMA can be implemented in…

There is widespread belief in the legal system that alcohol impairs witness testimony. Nevertheless, most laboratory studies examining the effects of alcohol on witness testimony suggest that alcohol may affect the number of correct but not incorrect details recalled. However, it is difficult to draw conclusions because sample sizes, testing…

This paper examines the insistent claims by advocates of evidence-based teaching that it is a rigorous scientific approach. The paper questions the view that randomised controlled trials and meta-analyses are the only truly scientific methods in educational research. It suggests these claims are often based on a rhetorical appeal which relies on…

The problem of assessing whether experimental results can be replicated is becoming increasingly important in many areas of science. It is often assumed that assessing replication is straightforward: All one needs to do is repeat the study and see whether the results of the original and replication studies agree. This article shows that the…

Studies of infant motor development in autism spectrum disorder (ASD) have increased in recent years. This article synthesized this literature through meta-analysis to assess (a) whether infant motor ability differs in ASD relative to neurotypical controls; and (b) whether motor ability and communication are related in infants with ASD. Study 1…

The purpose of this study was to examine STEM (Science, Technology, Engineering, Mathematics) education in meta-analytical and meta-thematic terms and to determine its impact on academic achievement and different variables. In this context, studies carried out on STEM between 2002-2019 were chosen. Data from 26 studies were included in the study…

Ten years after publication of two reviews of the evidence on phonics, a number of British policy initiatives have firmly embedded phonics in the curriculum for early reading development. However, uncertainty about the most effective approaches to teaching reading remains. A definitive trial comparing different approaches was recommended in 2006,…

Institutions have invested considerably in resources and staff to increase student success and persistence. However, retention rates have remained fairly steady over time. The purpose of this study was to synthesize undergraduate student persistence models into a singular parsimonious model using meta-analytic structural equation modeling to test…

The problem of assessing whether experimental results can be replicated is becoming increasingly important in many areas of science. It is often assumed that assessing replication is straightforward: All one needs to do is repeat the study and see whether the results of the original and replication studies agree. This article shows that the…

This study conducted a meta-analysis in the area of violent behaviors involving high school students. Meta-Analysis is essentially a systematic review; however, in addition to narrative summary that is conducted in a systematic review, in meta-analysis, the analysis also numerically pooled the results of the studies and arrived at a summary…

Network meta-analysis compares multiple treatments in terms of their efficacy and harm by including evidence from randomized controlled trials. Most clinical trials use parallel design, where patients are randomly allocated to different treatments and receive only 1 treatment. However, some trials use within person designs such as split-body,…

Meta-analyses often include only a small number of studies ([less than or equal to]5). Estimating between-study heterogeneity is difficult in this situation. An inaccurate estimation of heterogeneity can result in biased effect estimates and too narrow confidence intervals. The beta-binominal model has shown good statistical properties for…