MplusAutomation: An R Package for Facilitating Large-Scale Latent Variable Analyses in Mplus

MplusAutomation is a package for R that facilitates complex latent variable analyses in Mplus involving comparisons among many models and parameters. More specifically, MplusAutomation provides tools to accomplish 3 objectives: to create and manage Mplus syntax for groups of related models; to automate the estimation of many models; and to extract, aggregate, and compare fit statistics, parameter estimates, and ancillary model outputs. We provide an introduction to the package using applied examples including a large-scale simulation study. By reducing the effort required for large-scale studies, a broad goal of MplusAutomation is to support methodological developments in structural equation modeling using Mplus.     

Peer victimization and depression in children with and without motor coordination difficulties

Developmental coordination disorder (DCD) is a chronic disability that impacts children's performance of everyday motor‐based activities and is associated with the development of secondary social and mental health problems. The purpose of this study was to investigate peer victimization and depression in children who were and were not at risk for DCD. Selected from a population‐based sample, 159 at‐risk fifth graders were matched for age and gender to 159 controls. Children completed measures of depression and frequency of peer victimization. Results showed that children at risk for DCD reported more symptoms of depression and more frequent verbal and relational victimization than their peers. Being at risk for DCD and being bullied more frequently, especially relationally, significantly predicted increased depression symptoms. Findings highlight the importance of school psychologists remaining aware that children with DCD are at increased risk of experiencing bullying and depression. © 2012 Wiley Periodicals, Inc.     

Exploring School Principals’ Leadership Styles and Learners’ Educational Performance: A Perspective from High- and Low-Performing Schools

School leadership is fundamental to the educational functioning of schools and their improvements of results. The study employed a qualitative approach to explore school principals’ leadership styles and the educational performance of learners in high- and low-performing schools in Vhembe District, Limpopo, South Africa. The participants were purposefully selected from 10 secondary schools in terms of their performance. Focus group interviews were conducted with five teachers from each school. The interview data was transcribed and analysed, and identical patterns of coded data were grouped together under emerging themes. The overall results of the study indicated that the democratic leadership style together with the transformational leadership style contribute to high educational performance of learners. School principals from high- and low-performing schools employ a democratic leadership style and differ only in the sense that the latter are permissive or lenient towards learners’ behaviours or conduct. The study recommends that school principals engage teachers as members of a disciplinary committee in order to deal with those learners whose conduct is not conducive to successful teaching and learning. It is recommended that school principals from low-performing schools strengthen their democratic leadership by not being lenient to learners’ behaviour which is not conducive to successful teaching and learning.     

Gender-Typed and Gender-Segregated Play Among Tanzanian Hadza and Congolese BaYaka Hunter-Gatherer Children and Adolescents

Few data exist on gender-typed and gender-segregated play in hunter-gatherer societies, despite their unique demographic and cultural features which may influence children’s gendered play. Using naturalistic observations of Hadza (N = 46, 41% female) and BaYaka (N = 65, 48% female) hunter-gatherer 3- to 18-year-olds from Tanzania and the Republic of Congo, we showed that access to playmates was negatively associated with playing in mixed-gender groups. Young boys did not engage in more rough-and-tumble play than girls, but adolescent boys participated in this type of play more than adolescent girls. Children were also more likely to participate in work-themed play which conformed to gender norms within their society. Findings are discussed within the context of gendered division of labor, child autonomy, and demography.     

Reading Comprehension of Dutch Deaf Children

In this study, the reading comprehension of deaf children and adolescents in the Netherlands is examined along with their word identification. The reading comprehension of 464 deaf students and the word identification of 504 deaf students between 6 and 20 years of age was examined. The results show the reading comprehension scores of deaf children to be far below the scores of hearing children. On average, the deaf subjects scored at a level equivalent to a hearing child in the first grade. The word identification scores of the deaf children, however, were almost equivalent to the scores of hearing children. Although reading comprehension and word identification appear to be related, this relation does not completely explain the comprehension difficulties encountered by deaf children. Additional factors are required to explain deaf children’s difficulties with reading comprehension.     

Determination of clinically relevant content for a musculoskeletal anatomy curriculum for physical medicine and rehabilitation residents

To address the need for more clinical anatomy training in residency education, many postgraduate programs have implemented structured anatomy courses into their curriculum. Consensus often does not exist on specific content and level of detail of the content that should be included in such curricula. This article describes the use of the Delphi method to identify clinically relevant content to incorporate in a musculoskeletal anatomy curriculum for Physical Medicine and Rehabilitation (PM&R) residents. A two round modified Delphi involving PM&R experts was used to establish the curricular content. The anatomical structures and clinical conditions presented to the expert group were compiled using multiple sources: clinical musculoskeletal anatomy cases from the PM&R residency program at the University of Toronto; consultation with PM&R experts; and textbooks. In each round, experts rated the importance of each curricular item to PM&R residency education using a five‐point Likert scale. Internal consistency (Cronbach's alpha) was used to determine consensus at the end of each round and agreement scores were used as an outcome measure to determine the content to include in the curriculum. The overall internal consistency in both rounds was 0.99. A total of 37 physiatrists from across Canada participated and the overall response rate over two rounds was 97%. The initial curricular list consisted of 361 items. After the second iteration, the list was reduced by 44%. By using a national consensus method we were able to objectively determine the relevant anatomical structures and clinical musculoskeletal conditions important in daily PM&R practice. Anat Sci Educ 7: 135–143. © 2013 American Association of Anatomists.     

Relative preferences for various bivalued ratio schedules

Widely cited experiments on optimal foraging have used bivalued distributions as representing environmental stochasticity, characterizing these in terms of their arithmetic means. In contrast, research on free-operant choice has established that organisms prefer variable patterns of food delivery, relative to fixed patterns with the same mean values. To explore such departures from linear averaging, specifically with respect to bivalued alternatives, pigeons were given choices between a fixed-ratio (FR) schedule of food delivery that required 15, 30, or 60 responses and bivalued variable-ratio schedules with an arithmetic mean of 60,5 or 60, A bivalued schedule of 1 and 120 was preferred almost exclusively over each of the FR values. With a bivalued schedule of 15 and 105, there was a shift of preference, most notably in the FR-15 condition, but in no case was linear averaging a good predictor of the birds’ choices. Geometric averaging fared better, but even this failed to represent the apparent salience of the minimum value of the bivalued schedule in some conditions.     

Students in Australian Catholic and Independent Schools Have More Positive Learning Environments: Evidence From the 2012 PISA Study

Critics of Catholic and independent (nongovernment) schools in Australia contend that the higher levels of performance of students in nongovernment schools can be dismissed as simply a function of student- and especially school-level socioeconomic status (school-SES). A recent article extends this critique to school-sector differences in students’ evaluations of their teachers and schools, arguing that the observable school-sector differences are because of differences in school-SES, not because of school-sector differences in their teachers and schools. In response, this article reviews these arguments and focuses on school-sector differences in students’ evaluations of their teachers and schools using the Organization for Economic Development and Cooperation’s (OECD) measures in the PISA 2009 study. On eight of the 10 attitudinal measures, students attending Catholic and independent schools have more positive evaluations and these school-sector differences survive controls for students’ SES, their overall level of achievement and school-SES, which has no substantive influence. Although the effect sizes are generally small (0.06–0.26) their combined influence means that nongovernment school students enjoy superior learning environments which is likely to contribute to their generally higher levels of academic performance in senior secondary school.