The randomized control trial (RCT) is the primary experimental design in education research due to its strong internal validity for causal inference. However, in situations where RCTs are not feasible or ethical, quasi-experiments are alternatives to establish causal inference. This paper serves as an introduction to several quasi-experimental…

As the popularity of ethnographic research methods grows across and beyond the social sciences, it is of paramount importance that practitioners reflect on how to best teach participant observation to increasingly diverse and interdisciplinary audiences. While available literature stresses the importance of learning-by-doing to develop students'…

In June 2022, the Institute of Education Sciences (IES) introduced a new equity standard and associated recommendations to its Standards for Excellence in Education Research (SEER). On November 30 and December 1, 2022, IES convened a technical working group (TWG) of 15 experts on education equity. The goal of the TWG was to gather input for IES's…

In this perspective, we argue that the regular use of diversity advisory boards in autism research will improve the inclusivity and participation of marginalized groups in autism research and intervention development. We define a diversity advisory board as a representative group of community members, scholars, policymakers, and area experts that…

The interaction of quantitative and qualitative methodology in the mixed methods research (MMR) is analysed in a context of distinctions of the meanings between the terms typically used for description, combination, and integration. The interaction in the phases that precede the results, and their interpretation is considered. As an indicator of…

Recent metascience suggests that motor behavior research may be underpowered, on average. Researchers can perform a priori power analyses to ensure adequately powered studies. However, there are common pitfalls that can result in underestimating the required sample size for a given design and effect size of interest. Critical evaluation of power…

This paper examines the contributions of mapping research to critical qualitative research methodology. Mapping research is introduced, along with its history, the prevalence of geo- and socio-spatial theoretical frameworks used with the methodology, and the predominant framing of mapping research in the field of education. The main goal of this…

This article explains the basic ideas and practical challenges in clinical trials of new medicines to show the practical application of statistics in the real-world. The article explores the key considerations for the objectives and design of clinical trials and how these relate to the statistical investigation process. The article also includes…

Special education policy and scholarship have increasingly emphasized the use of research that encompasses interdependent methodological approaches designed to address specific questions. Consequently, the knowledge available to practitioners, policymakers, and other consumers is a function of the research designs featured in the literature. This…

Particularly young researchers face challenges in organizing large design science research (DSR) projects and often struggle to capture, communicate, and reflect on important components to produce purposeful outcomes. Making informed decisions at the project start, such as selecting suitable kernel theories and development procedures, is of great…

Design science research (DSR) is taught in university courses and used by students for their final theses. For successfully learning DSR, it is important to learn to apply it to real-world problems. However, students not only need to learn the new DSR paradigm (meta-level) but also need to develop an understanding of the problem domain…

Understanding when it is appropriate to make causal inferences from a statistical result is a fundamental skill for science literacy. Prior research has concentrated on erroneous causal judgments about observational studies, but there is little research on whether people understand that experiments provide stronger justification for causal claims.…

In Single-Case Designs (SCD), the outcome variable most commonly involves some form of count data. However, statistical analyses and associated effect size (ES) calculations for count outcomes have only recently been proposed. Three recently proposed ES methods for count data are: Nonlinear Bayesian effect size (Rindskopf, 2014), Log Response…

This methodological article expands the conversation about the contribution of joint displays in theoretically driven mixed method research in psychological fields. The author makes a distinction between basic displays that align qualitative and quantitative data or findings side-by-side from more dynamic displays that are used as analytical…

Two- and three-level designs in educational and psychological research can involve entire populations of Level-3 and possibly Level-2 units, such as schools and educational districts nested within a given state, or neighborhoods and counties in a state. Such a design is of increasing relevance in empirical research owing to the growing popularity…