The present dissertation is a synthesis and meta-analysis of the 15-year-old research domain of the L2 Motivational Self System (L2MSS) model initiated by Dornyei (2005). The study is based on data from 100 studies involving 144 unique samples and 51,905 participants, and it addresses the inter-relationships of L2MSS elements (i.e., the Ideal L2…

Establishing evidence- and research-based practices relies upon research synthesis of individual studies in reviews and meta analyses. Further summarizing scientific evidence about a specific topic by synthesizing reviews is an area of need to determine practices that have a strong evidence base and to identify areas of methodological weakness and…

Discrete trial training is a popular teaching method for individuals with autism, but is not easily implemented with fidelity due to its complexity. This is the first meta-analysis of single-case experimental design studies to quantify the impact of behavioral skills training on individuals' ability to implement discrete trials with fidelity.…

Discrete trial training is a popular teaching method for individuals with autism, but it is not easily implemented with fidelity due to its complexity. This is the first meta-analysis of single-case experimental design studies to quantify the impact of behavioral skills training on individuals' ability to implement discrete trials with fidelity.…

Self-regulated learning (SRL) studies have been widely researched, but there have been insufficient meta-analytical studies concerning the effects of self-regulated learning and achievement in science. This research, therefore, sought to perform a meta-analysis on the effects of self-regulated learning strategies on the achievement of students in…

Colleges and universities play a critical role in shaping intergroup dynamics in an era of increasing racial tensions in the United States. Diversity courses may serve as one important approach for preparing college students for participation in an equitable and just society, since this coursework holds a unique position at many institutions to…

Students with disorders of intellectual development (ID) experience challenges in reading and writing, indicating the need for research-based interventions. This systematic review and meta-analysis investigated the effects of reading and writing interventions for students aged 4-19 with disorders of ID using randomized controlled trials (RCTs) and…

The infusion and diffusion of the interactive whiteboard (IWB) has attracted considerable interest in educational contexts over the past years. However, research to date has been controversial with regard to the effectiveness of IWB-based instruction on cognitive learning outcomes. This study identified empirical publications that examine…

Teachers' authenticity is a topic of emerging interest in the field of education. This paper systematically reviews existing qualitative research on the subject of teachers' authenticity from the perspective of teachers and students. The findings from 12 studies are subject to a metasynthesis. Results show that the authentic teacher is…

In this study, we conducted a multilevel meta-analysis to determine whether the self-regulated strategy development (SRSD) approach to teaching writing to students with autism spectrum disorder (ASD) improves significantly the number of words written and overall quality of writing, whether the effects of SRSD were consistent or variable across…

Multisystemic Therapy® (MST®) is an intensive, home-based intervention for families of youth with social, emotional, and behavioural problems. MST therapists engage family members in identifying and changing individual, family, and environmental factors thought to contribute to problem behaviour. Intervention may include efforts to improve…

Financial education is a high priority for policymakers around the world. Many developing economies, including China and India, and the vast majority of OECD member countries, have implemented national financial education strategies. As enormous resources are being invested into financial education, the effectiveness of financial education…

This study set out to re-examine the effectiveness of study abroad programs in second language (L2) acquisition through a multi-level meta-analysis. Overall, 42 primary studies published between 1995 and 2019 were identified, and in total 283 effect sizes were meta-analysed. This study implemented a three-level random effects model to account for…

To facilitate a more definitive understanding of the usefulness of formative assessment, this meta-analysis examined the impact of formative assessment on student academic achievement in the K-12 classroom. The study analyzed 258 effect sizes from 118 primary studies published around the world. By applying a broad lens for defining and…

This paper shares the results of a meta-analysis on the parental-relational component of parental-involvement and its association with the academic and behavioral outcomes of urban students. This meta-analysis includes 76 quantitative studies. The results indicated that statistically significant effects emerged across students of different…