Background: Although the Depression Anxiety Stress Scales, Short Form (DASS-21) was developed for adults, its authors noted no compelling reasons to not use the measure with youth as young as 12 years. Despite increasingly widespread use with youth, psychometric evidence in support of its use with this population needs to be investigated to fully…

Self-regulated learning has seen a large increase in research interest due to its importance for online learning of higher education students. Several ways to measure self-regulated learning have been suggested. However, most measurements are either obtrusive, necessitating time and effort from students and potentially influencing the learning…

This dissertation presents an innovative approach to examining the keying method, wording method, and construct validity on psychometric instruments. By employing a mixed methods explanatory sequential design, the effects of keying and wording in two psychometric assessments were examined and validated. Those two self-report psychometric…

Purpose: The aim of the present study was to compare scale and conditional reliability derived from item response theory analyses among the most commonly used, as well as several newly developed, observation, interview, and parent-report autism instruments. Methods: When available, data sets were combined to facilitate large sample evaluation.…

Introduction: Understanding the mechanism through which test anxiety affects students' learning outcomes is critical to its management. Test preparation strategies are associated with test confidence and might also affect students' academic performance. However, previous studies have downplayed the role that students' test preparation strategies…

This study investigated the impact of language sample length on mean length of utterance (MLU) and aimed to determine the minimum number of utterances required for a reliable MLU. Conversations were collected from Mandarin-speaking, hard-of-hearing and typical-hearing children aged 16-81 months. The MLUs were calculated using sample sizes ranging…

Background: The Quality of Life Enjoyment and Satisfaction Questionnaire Short Form (Q-LES-Q-SF) is a well-established, clinically feasible measure of quality of life concerns when assessing relatively severe clinical populations of adult patients. To what degree might the Q-LES-Q-SF facilitate identifying quality of life concerns among parents of…

There is an urgent need for global citizens to develop sustainable development competencies (SDCs) if our world is to survive threats to its development and sustainability. These competencies can be developed through education for sustainable development (ESD). However, implementing ESD is challenged by teachers' and students' prioritisation of…

Although information related to mathematics achievement and participation are accessible, there is limited data associated with the simultaneous intersections of race and gender as it pertains to mathematics achievement. The purpose of this study was to determine the degree to which differences were present in overall mathematics achievement by…

The multistage testing (MST) design has been gaining attention and popularity in educational assessments. For testing programs that have small test-taker samples, it is challenging to calibrate new items to replenish the item pool. In the current research, we used the item pools from an operational MST program to illustrate how research studies…

Education reform in the United States is heavily regulated and has undergone various iterations in the past several decades. With each passing legislation, government mandates and educational initiatives become the focus of reform. School districts must constantly find ways to keep up with increasing state and federal accountability standards.…

Creative thinking was assessed as an innovative domain for the first time in PISA 2022. This report presents the creative thinking results for Australia as a whole, for the Australian states and territories and for the other groups in PISA 2022. It is one of two thematic reports providing additional high-level analysis of Australia's 2022 PISA…

This quantitative study examines the relationships among Scranton City School district students' scores on standards-based report cards and end-of-year TCAP (Tennessee Comprehensive Assessment Plan) mathematics scores. Specifically, relationship levels between teacher-reported levels of mastery by students on five state-directed mathematics…

This study is a validation of the LENA system for the Italian language. In Study 1, to test LENA's accuracy, seventy-two 10-minute samples extracted from daylong LENA recordings were manually transcribed for 12 children longitudinally observed at 1;0 and 2;0. We found strong correlations between LENA and human estimates in the number of Adult Word…

Empirically based tools to map education for sustainable development within school organisations are not readily available, which is both a cause and a consequence of the scarce empirical and quantitative research on school organisations and education for sustainable development. In present study, the Education for Sustainable Development School…