The causal mediation literature has developed techniques to assess the sensitivity of an inference to pretreatment confounding, but these techniques are limited to the case of a single mediator. In this article, we extend sensitivity analysis to possible violations of pretreatment confounding in the case of multiple mediators. In particular, we…

The article focuses on estimating effects in nonrandomized studies with two outcome measurement occasions and one predictor variable. Given such a design, the analysis approach can be to include the measurement at the previous time point as a predictor in the regression model (ANCOVA), or to predict the change-score of the outcome variable…

An appreciation of experimental design is an important aspect of introductory statistics teaching in a wide range of applied disciplines, including medical statistics. Understanding the impact of design decisions on the choice of analysis method and subsequent interpretation of results can help to embed the importance of statistical thinking in…

Cognition could be seen as a cascade of top-down and bottom-up processes across behavioural and psychophysiological layers in a cognitive architecture. Typical behavioural measurements used in education do not give information about lower cognitive layers. Event-Related Potentials (ERPs) derived from electroencephalography allow researchers to…

Single case experimental design (SCED) is an indispensable methodology when evaluating intervention efficacy. Despite long-standing success with using visual analyses to evaluate SCED data, this method has limited utility for conducting meta-analyses. This is critical because meta-analyses should drive practice and policy in behavioral disorders…

Augmented reality is a technology that is bringing great benefits in the educational field. This study focuses on knowing the performance and scientific production of augmented reality in the field of education. This research has been approached from a bibliometric perspective. A novel documentary analysis technique based on scientific mapping and…

This study examined bias reduction in the eight nonequivalent comparison group designs (NECGDs) that result from combining (a) choice of a local versus non-local comparison group, and analytic use or not of (b) a pretest measure of the study outcome and (c) a rich set of other covariates. Bias was estimated as the difference in causal estimate…

Intensive academic interventions help address the learning difficulties of students with specific learning disabilities (SLDs). Challenging behaviors exhibited during instruction can have a negative impact on the overall effectiveness of an academic intervention. In addition to academic interventions, students with SLD may benefit from behavioral…

Undergraduate research (UR) is regarded as an impactful instructional practice, but implementing it in the curriculum is challenging. Faculty members' approaches to the design of UR are under-explored due to the scarcity of studies that situate practices in both the curricular contexts and the concept of the research-teaching nexus. This…

International students are a key demographic in UK higher education, yet there is limited literature dedicated to pedagogies for and with international students. We undertook a systematic literature review of journal articles from 2013 to 2019 which presented empirical evidence on specific pedagogic practices relating to international students in…

The Centre for Psychosocial Research in Cancer conducts world-leading research and service evaluations to support well-being and quality of life amongst those affected by cancer. This paper reflects on how we adapted our research management and study methods during the COVID-19 pandemic, and the implications for ongoing research practice. We use…

Although experimental evaluations have been labeled the "gold standard" of evidence for policy (U.S. Department of Education, 2003), evaluations without an analysis of costs are not sufficient for policymaking (Monk, 1995; Ross et al., 2007). Funding organizations now require cost-effectiveness data in most evaluations of effects. Yet,…

The purpose of this study is to present a set of empirically derived effect size distributions in order to provide field-based benchmarks for assessing the relative effects of interventions aimed at reducing challenging behavior or increasing engagement for young children with and without disabilities. We synthesized 192 single-case designs that…

N-of-1 trials, a special case of Single Case Experimental Designs (SCEDs), are prominent in clinical medical research and specifically psychiatry due to the growing significance of precision/personalized medicine. It is imperative that these clinical trials be conducted, and their data analyzed, using the highest standards to guard against threats…

While design of artefacts plays a large role in mathematics education, in this paper we argue that this is not reflected in mathematics education research. Design may only be considered for publication as an appendix for or as a result of empirical research. We argue that this development, which is in line with the fading of subject-matter…