The purpose of this quantitative ex post facto study is to determine if and to what extent is there a statistically significant difference in math aptitude, as measured by SAT-Math scores, between African American male and female public high school students enrolled in a STEM program versus those enrolled in a non-STEM program in a high school of…

The Q-matrix played a key role in implementations of diagnostic classification models (DCMs) or cognitive diagnostic models (CDMs) -- a family of psychometric models that are gaining attention in providing diagnostic information on students' mastery of cognitive attributes or skills. Using two Monte Carlo simulation studies, this dissertation…

The current diagnostic criteria for the autism spectrum disorder (ASD) include the possibility to specify concomitant language difficulties. Purpose: Our main aim was to explore whether children with ASD-Level 1 (ASD-L1) present difficulties in the acquisition of structural language, as little work has been done in this regard so far. As a…

Science communication has historically been inequitable, with certain voices and perspectives holding the power and dominant ways of knowing being promoted over others. Recently, there has been a push toward inclusive science communication, which values diverse perspectives and ways of knowing in collaborative conversations to solve complex…

Students with strong metacognitive skills are positioned to learn and achieve more than peers who are still developing their metacognition. Yet, many students come to college without well-developed metacognitive skills. As part of a longitudinal study on metacognitive development, we asked when, why, and how first-year life science majors use…

Objective: To identify theory-based innovation characteristics associated with the adoption of consumer-based self-sampling methods for sexually transmitted infection screening. Participants: Guided by the Diffusion of Innovation, survey data from people assigned female at birth (AFAB) (n = 92) were analyzed. Methods: Forward regression models and…

In the growing body of English medium instruction (EMI) research, few studies have directly compared the effects of medium of instruction on subject learning. This study compares direct measures of content knowledge and perceptions of knowledge acquisition for students studying Chemistry via English (n = 27) and Japanese Medium Instruction (JMI)…

The perspective of emergent literacy was applied to investigate the name-writing skills of 4-year-old, low-income Mandarin Chinese-speaking children in Taiwan. One hundred and eleven children in Taiwan were recruited from 12 public preschools. Children were individually assessed with a name-writing task, the Peabody Picture Vocabulary…

Over the past decades, the demand for scientific research to link theory and practice so that innovative solutions can be developed through research has steadily increased (Klees & Tillmann, 2015; Sandoval & Bell, 2004). In this context, the design-based research (DBR) approach was developed, which examines the research object and the…

It is fundamental for language teachers to assess their students' performance. Therefore, they should be familiar with various forms of assessments because teaching and assessing languages are closely related and have a great deal to do with one another. This study examined EFL preservice teachers' perceptions of assessment literacy at a…

The purpose of this study was to examine clusters of less-skilled college readers. College students with below average reading comprehension skills (N = 77) read and thought aloud about four texts, recalled the texts, and completed standardized assessments of reading skills. Based on the findings of cluster analyses of the cognitive processes…

LXD Research conducted a study to examine the relationship between investment in Zaner-Bloser Handwriting program and Grade 3 student proficiency in handwriting in Alabama. Data from 4,759 students across 54 schools were analyzed, with schools categorized into Low Zaner-Bloser Handwriting (>$1 and [less than or equal to]$5 per student per…

This article presents a simple, cognitive theory of science and learning. The first section of the paper develops the theory's two main propositions: (i) A wide range of scientific activities rely heavily on one type of reasoning, hypothetical thinking, and (ii) This type of reasoning is also useful to students for learning science content. The…

Doctoral qualifying exams are considered essential in assessing a student's readiness for research and advanced studies. Despite their significant role in many physics programs, questions have been raised about their format, execution, and relevance. Our research investigates perceptions held by faculty members regarding the graduate doctoral…

This study is the first statewide analysis of the effectiveness of the Texas Teacher Incentive Allotment (TIA) program. Introduced in 2019, TIA is the most significant and unprecedented teacher merit-pay system in the U.S. Leveraging the Synthetic Control Method (SCM), we construct a counterfactual scenario to assess the causal impact of TIA on…