Deidra J. Young

Psychosocial Climate and Student Outcomes in Elementary Mathematics Classrooms: A Multilevel Analysis

Abstract Associations between perceived psychosocial climate and student outcomes among a sample of 1,512 students in Grade 5 mathematics classes in Singapore were investigated. Two methods of analysis were used: multiple linear regression and hierarchical linear modeling. A comparison of findings from the two approaches suggests (a) the existence of associations between outcomes and environment and (b) the usefulness of incorporating both data analysis methods in learning-environment research.

A Multilevel Analysis of Learning Environments and Student Attitudes

Abstract An investigation of relationships between students’ attitudes towards chemistry and their perceived laboratory environments was carried out using a sample of 1592 final year secondary school students in 56 chemistry classes in 28 randomly selected co‐educational government schools. This study is distinctive in that it marks the beginning of science classroom environment research in Singapore and because it pioneers the use of the Hierarchical Linear Model (HLM) in learning environment research. The Chemistry Laboratory Environment Inventory (CLEI), a modified version of the Science Laboratory Environment Inventory, was used to assess students’ perceptions of the learning environment in chemistry laboratory classes. Students’ chemistry‐related attitudes were assessed using the Questionnaire on Chemistry‐related Attitudes (QOCRA), which is based on the Test of Science‐related Attitudes. Environment‐attitude relationships were examined using conventional multiple regression analysis and the more rig...

Rural and Urban Differences in Student Achievement in Science and Mathematics: A Multilevel Analysis

ABSTRACT Recent educational research has demonstrated rural/urban differences in achievement and success in higher education. However, in order to assess the rural schools impact on student outcomes, rural/urban comparisons must be made after accounting for student background variables. Researchers have begun to question the generalisability of the effective school model for urban, suburban, and rural schools, given substantial differences in their social and organisational environments (Hannaway & Talbert, 1993). The purpose of this research study was to examine differences in student achievement between rural and urban schools in Western Australia, after controlling for student background variables. By using multilevel modelling techniques, this study demonstrated that the location of the school had a significant effect upon student achievement, with students attending rural schools not performing as well as students from urban schools.

Sleep problems in Rett syndrome

Rett syndrome (RTT) is a severe neurological disorder, affecting mainly females. It is generally caused by mutations in the MECP2 gene. Sleep problems are thought to occur commonly in Rett syndrome, but there has been little research on prevalence or natural history. An Australian population-based registry of cases born since 1976 has been operating since 1993, with current ascertainment at 300. The Australian Rett Syndrome Database (ARSD) consists of information about Rett syndrome cases including their functional ability, behaviour, sleep patterns, medical conditions and genotype. The cases range in age from 2 to 29 years. The aim of this study was to investigate the type and frequency of sleep problems, relationships with age and MECP2 mutation type and to evaluate changes over time. Parents or carers of the subjects with Rett syndrome were asked to complete a questionnaire about sleep problems on three separate occasions (2000, 2002 and 2004). Regression modelling was used to investigate the relationships between sleep problems, age and mutation type. Sleep problems were identified in over 80% of cases. The prevalence of night-time laughter decreased with age and the prevalence of reported night-time seizures and daytime napping increased with age. The prevalence of sleep problems was highest in cases with a large deletion of the MECP2 gene and in those with the p.R294X or p.R306C mutations. Sleep problems are common in Rett syndrome and there is some variation with age and mutation type.

The diagnosis of autism in a female: could it be Rett syndrome?

The overlap between autism and Rett syndrome clinical features has led to many cases of Rett syndrome being initially diagnosed with infantile autism or as having some autistic features. Both conditions seriously disrupt social and language development and are often accompanied by repetitive, nonpurposeful stereotypic hand movements. The aims of this study were to compare the early and subsequent clinical courses of female subjects with Rett syndrome categorised by whether or not a diagnosis of autism had been proposed before Rett syndrome had been diagnosed and compare the spectrum of methyl-CpG binding protein 2 (MECP2) mutations identified among the two groups. This study made use of a total of 313 cases recorded in two databases: the Australian Rett Syndrome Database (ARSD) and the International Rett Syndrome Phenotype Database (InterRett). Cases with an initial diagnosis of autism had significantly milder Rett syndrome symptoms and were more likely to remain ambulant, to have some functional hand use and not to have developed a scoliosis. Females with the p.R306C or p.T158M mutations in the MECP2 gene were more likely to have an initial diagnosis of autism, and the specific Rett syndrome symptoms were noted at a later age. We recommend that females who are initially considered to have autism be carefully monitored for the evolution of the signs and symptoms of Rett syndrome.

Factors Affecting Student Choice of Career in Science and Engineering: Parallel Studies in Australia, Canada, China, England, Japan and Portugal.

Abstract This paper describes parallel studies carried out in six countries which investigated the factors which influence school students towards careers and higher educational studies in the physical sciences or technology. The studies consisted of a common questionnaire survey, supplemented by student interviews. It reveals differences between scientists and non scientists in regard to their preferred learning styles, to the broad factors which were influential in their career choice and to their self perception against different personality types. Many factors are common across a wide range of countries. Implications of these findings for schools, higher education and government are discussed.

Feeding experiences and growth status in a Rett syndrome population.

Objectives: Feeding difficulties in Rett syndrome are complex and multifactorial. In this study, we describe the feeding experiences in Rett syndrome and examine the factors affecting growth. Materials and Methods: Using questionnaire data related to a population-based cohort, ages 2 to 29 years (n = 201), we measured the feeding experiences, growth, and factors affecting growth (enteral nutritional support, mutations, mobility, breath-holding, hyperventiliation) in subjects with Rett syndrome. Results: The mean weight, height, and body mass index z scores in subjects with Rett syndrome were below that of their age group and decreased steadily with age. Twenty percent of subjects had enteral nutrition support, and it was more common in the older age group. Those with truncating mutations had significantly less enteral nutrition support than the other mutation groups. Furthermore, those with low mobility had lower mean body mass index z scores than those with higher mobility, and increased frequency of breath-holding and hyperventilation also was associated with lower body mass index z scores. Conclusions: Routine monitoring of growth should continue to determine the severity of nutritional problems in Rett syndrome. Active nutritional management is recommended to ensure females affected with Rett syndrome have the best opportunity to reach their growth potential.

Attention deficit hyperactivity disorder: a Rasch analysis of the SWAN Rating Scale.

The prevalence of attention-deficit/hyperactivity disorder (ADHD) has been estimated at 3–7% in the population. Children with this disorder are often characterized by symptoms of inattention and/or impulsivity and hyperactivity, which can significantly impact on many aspects of their behaviour and performance. This study investigated the characteristics of the SWANRatingScale and its discrimination of ADHD subtypes. This instrument was developed by Swanson and his colleagues and measures attentiveness and hyperactivity on a continuum, from attention problems to positive attention skills, using a seven-point scale of behaviour: “far below average” to “far above average”. The Australian Twin Attention-Deficit/Hyperactivity Disorder Study consists of questionnaire data collected from families in 1990/2007. The Rasch model was used to measure the characteristics of items from the SWANRatingScale; how well these items discriminated between those with and without ADHD. The prevalence of each subtype was found to be 5.3% for inattentive ADHD, 4.3% for hyperactive ADHD and 4.6% for combined ADHD. A total of 14.2% of the cohort appeared to have ADHD. While the inattentive items appeared to be consistent with each other in their measurement behaviour and response patterns, the hyperactive items were less consistent. Further, the combined subtype appeared to be an entirely different type, with unique features unlike the other two subtypes. Further work is needed to distinguish the diagnostic features of each subtype of ADHD.

Socioeconomic and Gender Effects on Science Achievement: An Australian Perspective.

ABSTRACT The purpose of this study is to investigate science achievement of Australian students and how this achievement can vary from school to school. The proposition that gender and socioeconomic inequities in Australia are the result of school systems designed to reproduce an unequal social order was examined with reference both to current sociological literature and methodological techniques which account for the hierarchical nature of students nested in schools. Additionally, student‐level and school‐level variables are investigated for their ability to explain gender and socioeconomic differences in science achievement, as well as general student variability. Even after adjusting for the students’ individual characteristics and home backgrounds, as well as the context of the school, there were significant gender and socioeconomic differences in science achievement across Australian schools. The importance of variability in science achievement between schools is shown in this study, with specific re...

Factors affecting student career choice in science: An Australian study of rural and urban schools

In 1990/91, a research study was undertaken in England on the Factors Affecting Schools’ Success in Producing Engineers and Scientists (FASSIPES). This study was conducted by Brian Woolnough at the Oxford University Department of Educational Studies, in conjunction with the Institute of Physics and the Institution of Electrical Engineers and National Power (Woolnough, 1991, 1994; Woolnough et al., 1997). Principally, Woolnough attempted to ascertain why young people chose to pursue a career in the physical sciences and engineering. In addition, characteristics of schools which appeared to influence students to pursue a study of science were investigated. A number of countries have since replicated this study as an international research cooperative and the National Key Centre for School Science and Mathematics, Curtin University of Technology, Perth, Western Australia participated on behalf of Australia. Currently, the following countries have contributed to FASSIPES International in addition to England and Australia: Canada, China, Japan and Portugal.