The mixed treatment comparison (MTC) method has been proposed to combine results across trials comparing several treatments. MTC allows coherent judgments on which of the treatments is the most effective. It produces estimates of the relative effects of each treatment compared with every other treatment by pooling direct and indirect evidence. In…

Studies examining the influence of alcohol intoxication have reported mixed findings on whether it impairs eyewitness memory. Although the studies in this Special Issue investigated different questions and tested different variables, the findings of these studies collectively provide insight into mechanisms and methodological issues that may…

This study compared the quality of survey data collected from Mechanical Turk (MTurk) workers and college students. Three groups of participants completed the same survey. "MTurk" respondents completed the survey as paid workers using the Mechanical Turk crowdsourcing platform. "Student Online" respondents also completed the…

Background: The Rotterdam Evaluation Study of Stuttering Therapy randomized trial (RESTART) was seminal, comparing the Lidcombe Program with RESTART Demands and Capacities Model-based treatment (RESTART-DCM) for pre-school age children who stutter. Aims: To critique the methods of the RESTART trial to develop guidelines for its systematic…

Given the challenges of scaling up content-related professional development (PD), the PD facilitators have gained increasing attention in PD research. In this mainly programmatic and structural article, we try to systematize existing research strategies which take into account the multifaceted and multi-level structure of PD research. We discuss…

Re-turning to our experiences of putting a diffractive methodology to work ourselves, as well as engaging with the writings of Donna Haraway and Karen Barad, we produce some propositions regarding a diffractive methodology for researchers to consider. Postqualitative research disrupts the idea that educationalists can be given tools or techniques…

The aim of this study is to reveal the trends in studies on teaching mathematical skills and individuals with Down Syndrome (DS) from various perspectives by analyzing the content of scientific research articles in this field. As a result of literature review conducted for this purpose, a total number of 62 articles which can be accessed in full…

Research on dictionary use is a relatively new field in lexicography. Among them, the empirical studies which were few before 1990s has gained ground over recent three decades. Using data of 35 articles from "International Journal of Lexicography" (1987-2017), this study renders an analysis of the empirical research trends in the field…

Within the qualitative research community, narrative analysis research is a common method that is used to better understand a person's experiences or a collective experience. The use of narratives in Extension has been limited. Extension professionals primarily have used narratives as tools for conveying the value of Extension programs or, more…

A common theme uniting articles in this special issue is a focus on aptitude-by-treatment interactions (ATIs). This timely and welcome focus allows the field to synthesize current substantive findings on ATIs in educational intervention research in both reading and math domains. In this methodological commentary, we begin by reviewing traditional…

There is a need for effect sizes that are readily interpretable by a broad audience. One index that might fill this need is [pi], which represents the proportion of scores in one group that exceed the mean of another group. The robustness of estimates of [pi] to violations of normality had not been explored. Using simulated data, three estimates…

A vast body of research has shown that teacher identity matters, be it in mathematics or in any other subject. The means of investigating teacher identity greatly determine the knowledge we have; however, no review of the methodological approaches into this topic has yet been conducted. This paper provides an overview of the methodological…

Purpose: Measuring change is a common goal in clinical research, and comparing nonequivalent groups is sometimes a necessity in this context. Yet, evaluating change in this way can be problematic, and little consensus is reported on the best way to conduct such an evaluation. This tutorial presents the process of planning a clinical study designed…

Adventure expeditions are characterised by their unique temporal and spatial separateness from the quotidian and their exploratory and oft times risky nature. As such they offer a multitude of possibilities in research terms for the inquisitive investigator. Few studies however have considered the researcher's experience of exploring such…

This article examines the complexity and multiplicity of perspectives in studying organisational culture in higher education settings. This multiplicity of conceptualisations of cultures has purportedly been derived from the different points of view of many disciplines, which have made the study of culture and cultural research enigmatic for…