Two novel proofs show that the sum of a specific pair of normal random variables is not normal are established in this note. This is one of the most often misunderstood facts by first-year students in probability theory and statistics. The first proof is concise using the moment generating function. The second proof checks whether the moments of…

This article is part of a special LDRP research-to-practice series introducing key concepts to enable special education practitioners and other nonresearchers to be more informed research consumers. In the article, we explore how social validity is assessed in special education research and how to interpret social validity assessments. Rather than…

Given its centrality to assessment, until the concept of validity includes concern for racial justice, such matters will be seen as residing outside the "real" work of validation, rendering them powerless to count against the apparent scientific merit of the test. As the definition of validity has evolved, however, it holds great…

An interesting geometric conservation problem is presented. Here proof is presented in a 'proof without words' style, with the aim of developing the reader's visual proof ability. The study of the task and its expansion is accompanied by a dynamic sketch to highlight the conservation property.

In this perspective, the authors critically examine "rater training" as it has been conceptualized and used in medical education. By "rater training," they mean the educational events intended to "improve" rater performance and contributions during assessment events. Historically, rater training programs have focused…

In this article Antti Moilanen assesses criticisms of Wolfgang Klafki's model of exemplary teaching made by Meinert Meyer and Hilbert Meyer and by Chi-Hua Chu. "Exemplary teaching" is a style of discovery-based teaching in which students study concrete examples of general principles in such a way that they acquire transferable knowledge…

This paper scrutinizes the increasing trend of using international large-scale assessment (ILSA) data for causal inferences in educational research, arguing that such inferences are often tenuous. We explore the complexities of causality within ILSAs, highlighting the methodological constraints that challenge the validity of causal claims derived…

In this article, we argue that automated scoring engines should be transparent and construct relevant--that is, as much as is currently feasible. Many current automated scoring engines cannot achieve high degrees of scoring accuracy without allowing in some features that may not be easily explained and understood and may not be obviously and…

The purpose of this paper is to present a conversation about how impact has been seen and felt by youth and adult co-researchers in a long-term, school-based youth participatory action research (YPAR) project, "Courageous Conversations." To stay true to the epistemological commitments of YPAR, and in an effort to speak back to…

Adventure sports coaches must make sound judgements and effective decisions to ensure they can manage the significant risks present in an operating environment that is hyper-dynamic and has significant environmental complexity (Collins & Collins, 2013). High-level stakeholders in adventure sports require coaches demonstrate competency to…

In response to considerable critique of its rigour and relevance, the field of educational research has sought to prove its validity, both in terms of its scientific legitimacy and its relevance to policy and practice. One result of this has been a heightened concern with methodology, to the extent that a form of methodolatry has developed. In…

Since 1983, the Instructional Theory Framework (ITF) (and its subsequent improvements) has guided instructional designers and researchers in designing and developing useful learner experiences (LX). For the past 40 years, the ITF was laser-focused on the selection of instructional methods, downplaying delivery methods (media) and management…

Focusing on systematic observation, one of the most potent methods of studying teaching quality, represents one of the numerous contributions of Daryl Siedentop to the profession. While he had a clear focus on issues of validity and reliability concerning systematic observation, over the past decades, attention to such issues appears to have…

A recent article in this journal claims that the simple view of reading represents a long-outdated account of what underlies the ability to read. Its authors argue that if teachers are to be better informed about what is known about reading then the simple view must be replaced by a more current model, one that captures the substantial progress…

Recent usage of virtual reality (VR) technology in surgical training has emerged because of its cost-effectiveness, time savings, and cognition-based feedback generation. However, the quantitative evaluation of its effectiveness in training is still not thoroughly studied. This article demonstrates the effectiveness of a VR-based surgical training…