E-learning has grown at a considerable rate, and current projections show no slowdown in the near future. The National Center for Education Statistics estimates that between 2000 and 2008 the share of undergraduates enrolled in at least one online course grew from 8 percent to 20 percent. This study refers to e-learning as all forms of…

One of the vexing problems in the analysis of SSD is in the assessment of the effect of intervention. Serial dependence notwithstanding, the linear model approach that has been advanced involves, in general, the fitting of regression lines (or curves) to the set of observations within each phase of the design and comparing the parameters of these…

The paper represents a synthesis of results obtained in empirical studies of variables related to learning process. A number of studies were carried out within the Students Approaches to Learning perspective. According to the 3P model of learning, the complex of learning process comprises three learning approaches--Deep, Surface and Achievement…

Web-based psychological interventions aim to make psychological treatments more accessible and minimize clinician input, but their effectiveness requires further examination. The purposes of the present study are to evaluate the outcomes of web-based interventions for treating depressed adults using meta-analytic techniques, and to examine…

This meta-analysis examined 36 studies comparing autism spectrum disorder (ASD) and control groups in reading comprehension. Three moderators (semantic knowledge, decoding skill, PIQ) and two text types (high vs. low social knowledge) were examined as predictors of reading comprehension in ASD. The overall standardized mean difference for reading…

This study examined the impact of publication bias on a meta-analysis of empirical studies on validity of University Matriculation Examinations in Nigeria with a view to determine the level of difference between published and unpublished articles. Specifically, the design was an ex-post facto, a causal comparative design. The sample size consisted…

In the present study the results of two meta-analyses on the effectiveness of "individually" delivered indicated school-based interventions for externalizing behavior problems at elementary schools are presented. A distinction was made between studies that evaluated effects of interventions with only an individual component (k = 11 studies, n =…

Many meta-analyses of comparative outcome studies found a substantial association of researcher allegiance (RA) and relative treatment effects. Therefore, RA is regarded as a biasing factor in comparative outcome research (RA bias hypothesis). However, the RA bias hypothesis has been criticized as causality might be reversed. That is, RA might be…

The primary purpose of this study was to examine, using meta-analytical techniques, the differential effects of differing intensities of acute exercise on speed and accuracy of cognition. Overall, exercise demonstrated a small, significant mean effect size (g = 0.14, p less than 0.01) on cognition. Examination of the comparison between speed and…

This study examined interventions for addition and subtraction that were implemented through single-case design (SCD) research studies. We attempted to extend prior SCD meta-analyses by examining differences in effect sizes across several moderating variables and by including a novel index of effect, improvement rate difference (IRD). We also…

This study assessed the effectiveness of culturally sensitive interventions (CSIs) ("N" = 10) designed to address substance use among minority youths. Study methods consisted of systematic search procedures, quality of study ratings, and meta-analytic techniques to gauge effects and evaluate publication bias. The results, across all measures and…

Reviews of the effects of noise on performance carried out in the 1980s suggested that results depended on the type of noise, nature of the task, and characteristics of the person performing in noise. This general view has been confirmed in the recent meta-analysis and synthesis by Szalma and Hancock (2011). There are, however, some notable…

Meta-analysis was used to comprehensively summarize the relationship between dispositional variables and both directions of work-family conflict. The largest effects detected were those associated with negative affect, neuroticism, and self-efficacy; all were in expected directions. In general, negative trait-based variables (e.g., negative affect…

Socio-economic hardships put children in an underprivileged position. This systematic review was conducted to identify factors linked to underachievement of disadvantaged pupils in school science and maths. What could be done as evidence-based practice to make the lives of these young people better? The protocol from preferred reporting items for…

Meta-analytic research suggests an edge of explicit over implicit instruction for the development of complex L2 grammatical structures, but the jury is still out as to which type of explicit instruction--"deductive" or "inductive," where rules are respectively provided or elicited--proves more effective. Avoiding this…