A central theme in the field of survey statistics is estimating population-level quantities through data coming from potentially non-representative samples of the population. Multilevel regression and poststratification (MRP), a model-based approach, is gaining traction against the traditional weighted approach for survey estimates. MRP estimates…

This study investigated the extent to which class-specific parameter estimates are biased by the within-class normality assumption in nonnormal growth mixture modeling (GMM). Monte Carlo simulations for nonnormal GMM were conducted to analyze and compare two strategies for obtaining unbiased parameter estimates: relaxing the within-class normality…

Nonnormality of univariate data has been extensively examined previously (Blanca et al., 2013; Micceri, 1989). However, less is known of the potential nonnormality of multivariate data although multivariate analysis is commonly used in psychological and educational research. Using univariate and multivariate skewness and kurtosis as measures of…

Growth curve modeling provides a general framework for analyzing longitudinal data from social, behavioral, and educational sciences. Bayesian methods have been used to estimate growth curve models, in which priors need to be specified for unknown parameters. For the covariance parameter matrix, the inverse Wishart prior is most commonly used due…

Academic workloads in online learning are influenced by many variables, the complexity of which makes it difficult to measure academic workloads in isolation. While researching issues associated with academic workloads, professional development stood out as having a substantive impact on academic workloads. Many academics in applied health degrees…

In light of the emergence of statistical analysis techniques based on data mining in education sciences, and the potential they offer to detect non-trivial information in large databases, this paper presents a procedure used to detect factors linked to academic achievement in large-scale assessments. The study is based on a non-experimental,…

This study seeks to identify the leadership behaviours displayed by non-academic middle-level managers in the Australian higher education sector. The study also identifies the importance of these leadership behaviours and the leadership effectiveness of these managers. The integrated competing values framework was used to measure leadership…

Purpose: Dog owners represent 40% of the population, a promising audience to increase population levels of physical activity. The purpose of this study was to develop and test the psychometric properties of a new instrument to assess social-cognitive theory constructs related to dog walking. Method: Dog owners ("N" = 431) completed the…

Since the United States Congress enacted the No Child Left Behind Act in 2001, school districts have been charged with ensuring that all students are proficient in reading and math by 2014. Schools failing to achieve are labeled as failing or needing improvement. This study sought to determine if commercially produced elementary math curricula…

The No Child Left Behind (NCLB) legislation of 2001 increased the stakes for all schools to increase student achievement by mandating all students meet or exceed state standards by 2014. A small rural school responded 5 years ago to their failure to make adequate yearly progress (AYP) by implementing professional learning communities (PLC) as a…

Investigated effect of the high skewness typically present in distributions of depressive symptom scores on findings of a gender difference in depression. Skewness allowed a few extreme scores among women to produce significant between-groups differences in untransformed scores even when male and female groups' distributions were otherwise…

Introduction: The paper is based on the study of library users in Slovakia as part of a larger research project on the use of information. Method: A large-scale questionnaire survey was conducted in 2002 in sixteen academic and research libraries with 793 subjects, especially students and educators. Analysis: The data were analysed with the use of…