Diagnostic test accuracy studies frequently report on sensitivities and specificities for more than one threshold of the diagnostic test under study. Although it is obvious that the information from all thresholds should be used for a meta-analysis, in practice, frequently, only a single pair of sensitivity and specificity is selected. To overcome…

The present study examined whether mock offenders, who were instructed to falsely deny crime details or to simulate amnesia, would consequently experience impaired memory. Ninety-three university students were first asked to commit a mock crime and were then assigned to three different conditions (i.e., false denial, simulated amnesia, and truth…

In a spiral galaxy, the stars move in a circular motion around the galactic center, and the relation between velocity and the orbital radius is referred to as the rotation curve. Previous astronomical observation data indicate that the rotation curve is flat at the periphery of the galaxy, which completely dissatisfies Keplerian decline. Assuming…

The "D"-scoring method for scoring and equating tests with binary items proposed by Dimitrov offers some of the advantages of item response theory, such as item-level difficulty information and score computation that reflects the item difficulties, while retaining the merits of classical test theory such as the simplicity of number…

This study investigates the role that textbooks, virtual reality (VR), and mixed approaches (i.e., text and VR) can play in the development of the two writing types, summary and argument writing. This study uses hemodynamics as a proxy for learning. Differences in hemodynamic responses during writing tasks were measured across four different…

The article describes a multi-phase, in-class simulation that employs problem-based learning to teach operations and process-improvement concepts as part of an undergraduate or graduate business course. The simulation is derived from a corporate Lean Six Sigma training activity and has been modified to introduce, demonstrate, and apply a wide…

This study attempts to construct a communication framework of video game avatars. Employing Aarseth's textonomy, Rehak's avatar's life cycle, and Lury's prosthetic culture avatar's theories as the basis of analysis on fifty-five purposively selected games, this study proposes ACTION (Avatars, Communicators, Transmissions, Instruments, Orientations…

The aim of this study was to examine the precision of item parameter estimation in different sample sizes and test lengths under three parameter logistic model (3PL) item response theory (IRT) model, where the trait measured by a test was not normally distributed or had a skewed distribution. In the study, number of categories (1-0), and item…

A planetarium is an invaluable tool for teaching introductory astronomy, but one that few astronomy educators have ready access to. Here we describe a do-it-yourself planetarium that can be built with modest funding. There have been other planetarium construction projects described in the literature and online, most of which use cardboard to make…

Scoring divergent-thinking response sets has always been challenging because such responses are not only open-ended in terms of number of ideas, but each idea may also be expressed by a varying number of concepts and, thus, by a varying number of words (elaboration). While many current studies have attempted to score the semantic distance in…

Across the Central Eastern European region, inclusive education has become a policy aim. Europeanization, influence of United Nations agencies, and shifts away from Soviet models of education have led to new policy aspirations for the inclusion of children with special education needs (SEN). At the same time, policies in many countries often lack…

Test items must often be broad in scope to be ecologically valid. It is therefore almost inevitable that secondary dimensions are introduced into a test during test development. A cognitive test may require one or more abilities besides the primary ability to correctly respond to an item, in which case a unidimensional test score overestimates the…

Contribution: A semester-long project, geared towards a multidisciplinary group of undergraduate engineering students, to design and simulate a large-scale microelectromechanical systems (MEMS) 2-D optical scanner is presented. Background: MEMS component design and fabrication typically requires a cleanroom and costly high-vacuum equipment; these…

Purpose: For listeners with single-sided deafness, a cochlear implant (CI) can improve speech understanding by giving the listener access to the ear with the better target-to-masker ratio (TMR; head shadow) or by providing interaural difference cues to facilitate the perceptual separation of concurrent talkers (squelch). CI simulations presented…

Building a virtual laboratory for teaching and learning is a highly complex process, incorporating diverse areas such as interaction design, visualisation, and pedagogy. This article focuses on the production and implementation issues that were found in the comparison of two different virtual laboratory projects, and discuss which design…