This commentary discusses the issue of small samples in instructed second language acquisition research. We discuss the current state of affairs, and consider the disadvantages of small samples. We also explore other considerations regarding sample size, such as research ethics and ecological validity. We present a range of recommendations for…

This study introduces an innovative meta-analytic approach, two-stage multilevel meta-analysis that considers the hierarchical structure of single-case experimental design (SCED) data. This approach is unique as it is suitable to include moderators at the intervention level, participant level, and study level, and is therefore especially…

Capturing developmental and learning-induced brain dynamics is extremely challenging as changes occur interactively across multiple levels and emerging functions. Different levels include the (social) environment, cognitive and behavioral levels, structural and functional brain changes, and genetics, while functions include domains such as math,…

Background: The COVID-19 pandemic and the subsequent public health response led to an unprecedented disruption in educational instruction in the U.S. and around the world. Many schools quickly moved to virtual learning for the bulk of the 2020 spring term and many states cancelled annual assessments of student learning. The 2020-21 school year…

In this second column regarding research approaches, we continue our discussion of qualitative and quantitative research focusing on the specializations of developmental education, learning assistance, and student success. Whereas the previous column discussed mixed methods as an underutilized method, similarly, design research has the potential…

The generation effect is moderated by experimental design, as are a number of other encoding variables, such that the generation effect recall is typically larger in mixed-list than pure-list designs. In typical experiments on design effects, each study list is followed by its own recall test. Rowland, Littrell-Baez, Sensenig, and DeLosh (2014)…

We present a framework to help those working in Extension connect program designs with appropriate evaluation designs to improve evaluation. The framework links four distinct Extension program domains--service, facilitation, content transformation, and transformative education--with three types of evaluation design--preexperimental,…

This paper introduces the "Personal Model for Research" (PMR) version 2 as a framework and a tool to learn design of research proposals. It is better to say "design" instead of "writing" as usually referred in literature because "writing" cognitively induces to see the making of a research proposal as a…

Purpose: Insight has grown that for an organization to learn and change successfully, forgetting and unlearning are required. The purpose of this paper is to summarize the relevant existing body of empirical research on forgetting and unlearning, to encourage research using a greater variety of methods and to contribute to a more complementary…

The overarching purpose of this article is to provide an introduction to the use of rigorous single-case research designs (SCRDs) in special education and related fields. Authors first discuss basic design types and research questions that can be answered with SCRDs, examine threats to internal validity and potential ways to control for and detect…

Purpose: The purpose of this paper is to examine the research design of several publications on the study of gamification and proposes a mixed-method research design for creating a holistic understanding of the gamification phenomenon. It presents an argument in support of combining both qualitative and quantitative data sources through…

Replication has long been a cornerstone for establishing trustworthy scientific results, but there remains considerable disagreement about what constitutes as a replication, how results from these studies should be interpreted, and whether direct replication of results is even possible. This article addresses these concerns by presenting the…

This study examines undergraduates' research practices, as described in reflective essays submitted in applications to a library research award. Thematic analysis of 24 student award essays identified three strong themes in student reflections about their research experiences. Students experienced research as a social process, made meaning closely…

Indigenous people are often hesitant to participate in research projects because they lack trust in researcher intentions. In this article, we explore the critical role that Indigenous boundary spanners play in research conducted with Indigenous communities through our research on oceans and human health. Our analysis centers around five…

Schools are ideal settings to promote adolescent physical activity (PA), yet school-based interventions have shown limited long-term impact. This position paper presents key issues surrounding school-based PA interventions. Collaborative conceptual thinking drawing on multi-author expertise and available evidence advanced our understanding and…