In the 1980s, Polish schools hardly had access to computers, particularly at the primary and secondary levels. The main reasons were funds and shortage of qualified staff that could handle computer hardware. As a consequence, the youth first came across a computer, how to use it, service hardware, and write programs outside schools in the early…

Population adjustment methods such as matching-adjusted indirect comparison (MAIC) are increasingly used to compare marginal treatment effects when there are cross-trial differences in effect modifiers and limited patient-level data. MAIC is based on propensity score weighting, which is sensitive to poor covariate overlap and cannot extrapolate…

Despite the growing attention to online social comparison, most studies have focused on the psycho-emotional implications of the behavior, leaving the identity implications ambiguous. Given the importance of identity development and the prevalence of social media use among emerging adults going through college transition, this study explored how…

The internal validity of observational study is often subject to debate. In this study, we define the counterfactuals as the unobserved sample and intend to quantify its relationship with the null hypothesis statistical testing (NHST). We propose the probability of a robust inference for internal validity, that is, the PIV, as a robustness index…

Item analysis is performed by developers as an integral part of the scale development process. Thus, items are excluded from the scale depending on the item analysis prior to the factor analysis. Existing item discrimination indices are calculated based on correlation, yet items with different response patterns are likely to have a similar item…

The current study aims to explore the impact of the two-column format in writing simple mathematical arguments. That is to say, a structured method of presenting a mathematical proof or argument by using a tabular layout with two columns. The underlying goal of the research reported in this paper is to inform understanding of how to effectively…

This study reports on comparing the presentation of mathematical content, types of responses required of students, conformity with the curriculum outcomes, and potentially confusing expressions in the subjects of percentages, triangles, and quadrilaterals of fifth-grade mathematics textbooks used in Turkey and Singapore. Document analysis of the…

Goniometry is commonly used to evaluate joint range of motion (ROM). The most widespread method, a manual universal goniometer (UG), is considered time-consuming and difficult to handle. The digital goniometer EasyAngle (EA) was developed to improve and simplify the evaluation of ROM. This study aimed to evaluate the reliability and validity of EA…

Recently, adaptive test approaches have become a viable alternative to traditional fixed-item tests. The main advantage of adaptive tests is that they reach desired measurement precision with fewer items. However, fewer items mean that each item has a more significant effect on ability estimation and therefore those tests are open to more…

Item parameter drift (IPD) is the systematic differentiation of parameter values of items over time due to various reasons. If it occurs in computer adaptive tests (CAT), it causes errors in the estimation of item and ability parameters. Identification of the underlying conditions of this situation in CAT is important for estimating item and…

Children's picture books are introduced to children during their foundational years and is often a child's first exposure to culture. It is imperative that those depictions are authentic portrayals of African American culture. This study is a replication of Ussery's 2006 analysis of the characterization of African American characters in award…

This 50-state comparison assesses the K-12 school safety policies in all 50 states and the District of Columbia. The information presented in this interactive resource gives an overview of relevant laws in each state and does not reflect how these laws may interact with other state or federal policies. The interactive resource does not include…

Item-level fit analysis not only serves as a complementary check to global fit analysis, it is also essential in scale development because the fit results will guide item revision and/or deletion (Liu & Maydeu-Olivares, 2014). During data collection, missing response data may likely happen due to various reasons. Chi-square-based item fit…

Teachers are one of the largest licensed groups in the United States, and nearly all teachers are required to pass a licensure exam before entering classroom practice (U.S. Department of Education, 2016). However, "questions abound as to those exams' quality, design, and purpose: To what extent do they actually assess important professional…

Philosophical pragmatists rarely receive credit for their contribution to virtue ethics. But perhaps they should. How did America's philosopher of democracy, John Dewey, and one of its most famous elder statesmen, Benjamin Franklin, advise troubled souls in search of moral improvement? According to James Campbell, Dewey and Franklin recommended…