Increased second language acquisition (SLA) research interest in the effect of planning on subsequent L2 oral production has typically examined the effect of planning on the syntactic complexity, accuracy, lexical complexity, and/or fluency (CALF) of L2 production. However, the results of research in this domain are inconclusive. This study, a…

Purpose: Systematic review and meta-analysis are regarded as standard and valuable tools for providing an objective and reproducible synthesis of research findings in the literature. Their increasing popularity has led to heightened expectations for comprehensiveness and rigor in conducting scientific reviews and analyses. The purpose of this…

Vitamin and fatty acid deficiency in children diagnosed with autism has been linked to the etiology and course of the disease but the results have been inconsistent. In our work, we present a narrative review, which includes 20 observational studies that provide data on the blood levels of vitamin D, folate, or fatty acids of children diagnosed…

Although instructional videos with on-screen instructors have become prevalent in various learning contexts, their effect has been questioned because of mixed findings in the literature. This meta-analysis study aimed to elucidate the overall effect of instructor-present videos on learning, cognitive load, motivation, and social presence and to…

Exploring language learners' anxiety is not a neglected area of inquiry in applied linguistics research, which can primarily be attributed to the publication of the "Foreign Language Classroom Anxiety Scale" ("FLCAS"), an influential instrument developed by Horwitz et al. (1986) to measure language anxiety. An ever-growing…

It is important to be able to identify research results likely to have been arrived at by means of "'p'-hacking," a common term for research and reporting practices (such as the selective reporting of results) that are biased toward finding "p" < [alpha]. This paper discusses and demonstrates "'p'-curving," a means…

Standard methods for the meta-analysis of medical tests, without assuming a gold standard, are limited to dichotomous data. Multivariate probit models are used to analyse correlated dichotomous data, and can be extended to model ordinal data. Within the context of an imperfect gold standard, they have previously been used for the analysis of…

Purpose: Enculturation is a central and defining idea within socioculturally minded research that informs the design of school learning environments. Now, three decades since the idea has emerged in the field, the authors believe it is time to reflect on it because of several ambiguities that have emerged from its use, which is the purpose of this…

The current meta-analysis quantifies the average effect of worked examples on mathematics performance from elementary grades to postsecondary settings and to assess what moderates this effect. Though thousands of worked examples studies have been conducted to date, a corresponding meta-analysis has yet to be published. Exclusionary coding was…

Understanding rational numbers is critical for secondary mathematics achievement. However, students with mathematics difficulties (MD) struggle with rational number topics, including fractions, decimals, and percentages. The purpose of this systematic review was to describe the instructional foci of rational number interventions, determine the…

Purpose: This study aims to support researchers and practitioners in finding suitable instruments for future research studies and organizational quality assessments. Design/methodology/approach: Employees' success of learning at work is strongly influenced by the quality of the workplace learning environment. In the recent decades growing effort…

The purpose of this study is to determine the effect size of gender on motivation towards science learning by combining the results of studies, which were conducted to determine the effect of gender on motivation towards science learning, via the meta-analysis method. In this context, master's thesis, doctoral dissertations, and articles, which…

In this study, we report on a Systematic Mapping Study (SMS) for the application of technology acceptance models to Moodle under the prism of latent variable modeling. Based on an automatic search including primary studies from journals, conferences, and book chapters during 2001 to 2019, 41 primary were selected. We aim to contribute to a better…

Estimation of within-trial interactions in meta-analysis is crucial for reliable assessment of how treatment effects vary across participant subgroups. However, current methods have various limitations. Patients, clinicians and policy-makers need reliable estimates of treatment effects within specific covariate subgroups, on relative and absolute…

Meta-analyses are systematic summaries of research that use quantitative methods to find the mean effect size (standardized mean difference) for interventions. Critics of meta-analysis point out that such analyses can conflate the results of low- and high-quality studies, make improper comparisons and result in statistical noise. All these…