The influence of a 6.5% carbohydrate-electrolyte solution on performance of prolonged intermittent high-intensity running at 30 degrees C

Nine male student games players consumed either flavoured water (0.1 g carbohydrate, Na+ 6 mmol x l(-1)), a solution containing 6.5% carbohydrate-electrolytes (6.5 g carbohydrate, Na+ 21 mmol x l(-1)) or a taste placebo (Na+ 2 mmol x l(-1)) during an intermittent shuttle test performed on three separate occasions at an ambient temperature of 30 degrees C (dry bulb). The test involved five 15-min sets of repeated cycles of walking and variable speed running, each separated by a 4-min rest (part A of the test), followed by 60 s run/60 s rest until exhaustion (part B of the test). The participants drank 6.5 ml x kg(-1) of fluid as a bolus just before exercise and thereafter 4.5 ml x kg(-1) during every exercise set and rest period (19 min). There was a trial order effect. The total distance completed by the participants was greater in trial 3 (8441 +/- 873 m) than in trial 1 (6839 +/- 512, P < 0.05). This represented a 19% improvement in exercise capacity. However, the trials were performed in a random counterbalanced order and the participants completed 8634 +/- 653 m, 7786 +/- 741 m and 7099 +/- 647 m in the flavoured water (FW), placebo (P) and carbohydrate-electrolyte (CE) trials, respectively (P = 0.08). Sprint performance was not different between the trials but was impaired over time (FW vs P vs CE: set 1, 2.41 +/- 0.02 vs 2.39 +/- 0.03 vs 2.39 +/- 0.03 s; end set, 2.46 +/- 0.03 vs 2.47 +/- 0.03 vs 2.47 +/- 0.02 s; main effect time, P < 0.01). The rate of rise in rectal temperature was greater in the carbohydrate-electrolyte trial (rise in rectal temperature/duration of trial, degrees C x h(-1); FW vs CE, P < 0.05; P vs CE, N.S.). Blood glucose concentrations were higher in the carbohydrate-electrolyte than in the other two trials (FW vs P vs CE:rest, 4.4 +/- 0.1 vs 4.3 +/- 0.1 vs 4.2 +/- 0.1 mmol x l(-1); end of exercise, 5.4 +/- 0.3 vs 6.4 +/- 0.6 vs 7.2 +/- 0.5 mmol x l(-1); main effect trial, P < 0.05; main effect time, P < 0.01). Plasma free fatty acid concentrations at the end of exercise were lower in the carbohydrate-electrolyte trial than in the other two trials (FW vs P vs CE: 0.57 +/- 0.08 vs 0.53 +/- 0.11 vs 0.29 +/- 0.04 mmol x l(-1); interaction, P < 0.01). The correlation between the rate of rise in rectal temperature (degrees C x h(-1)) and the distance completed was -0.91, -0.92 and -0.96 in the flavoured water, placebo and carbohydrate-electrolyte conditions, respectively (P < 0.01). Heart rate, blood pressure, plasma ammonia, blood lactate, plasma volume and rate of perceived exertion were not different between the three fluid trials. Although drinking the carbohydrate-electrolyte solution induced greater metabolic changes than the flavoured water and placebo solutions, it is unlikely that in these unacclimated males carbohydrate availability was a limiting factor in the performance of intermittent running in hot environmental conditions.     

Social support,academic adversity and academic buoyancy: a person-centred analysis and implications for academic outcomes

The present study employed person-centred analyses that enabled identification of groups of students separated on the basis of their perceptions of social support (home and community), academic support, academic adversity and academic buoyancy. Among a sample of 249 young people, including many from high-needs communities, cluster analysis revealed three distinct groups of students: the thriver, supported struggler and at-risk struggler. We compared the three groups on their academic motivation. Analyses revealed significant differences between groups in adaptive motivation outcomes, but no differences in impeding or maladaptive motivation outcomes. Combined, the results speak to the importance of support and academic buoyancy for positive student outcomes.     

Multidimensional motivation and engagement for writing: construct validation with a sample of boys

Given recent concerns around boys’ literacy, this study examined multidimensional writing motivation and engagement among boys. We explored internal and external validity of 11 adaptive (e.g. self-efficacy for writing) and maladaptive (e.g. disengagement from writing) factors of writing motivation and engagement. The sample comprised 781 male Australian high school students (aged 11–18 years). We used confirmatory factor analysis and structural equation modelling to conduct our analyses. Results confirmed the internal structure of the factors and revealed that parent education, and to a lesser degree language background, predicted several motivation and engagement factors. In addition, the adaptive motivation and engagement factors were associated positively with several writing (e.g. enjoyment of writing) and literacy outcomes (e.g. literacy achievement), whereas the maladaptive factors tended to be negatively associated. Invariance was found in the associations among the motivation and engagement factors and the outcomes across several participant subgroups (e.g. by gender, language background). There was also measurement invariance between the study’s sample and five randomly drawn samples of students from archived data on domain-general academic motivation and engagement. Combined, our analyses shed light on a domain-specific area of motivation and engagement – writing – that could benefit from an integrative multidimensional examination.     

Improving Teaching Quality and the Learning Organisation

This study applied a learningorganisation framework to understand academicdepartments' efforts to improve teachingquality. The theoretical framework wasgenerated from literature on learningorganisations, organisations devoted tocontinuous improvement through continuouslearning. Research questions addressedrelationships among departments' vision,leadership, knowledge management,communication, learning culture, and teachingimprovement. Using survey data collected fromdepartment chairs, this study found a positiveassociation between learning organisationbehaviours and the improvement of teaching.     

Improving teaching quality and the learning organisation

Abstract

This study applied a learning organisation framework to understand academic departments’ efforts to improve teaching quality. The theoretical framework was generated from literature on learning organisations, organisations devoted to continuous improvement through continuous learning. Research questions addressed relationships among departments’ vision, leadership, knowledge management, communication, learning culture, and teaching improvement. Using survey data collected from department chairs, this study found a positive association between learning organisation behaviours and the improvement of teaching.     

Examining the yields of growth feedback from science teachers and students' intrinsic valuing of science: Implications for student- and school-level science achievement

Students' science knowledge and skills are considered critical to growing the intellectual capital on which societies rely to innovate and prosper. However, recent research has documented notable declines in students' intrinsic valuing of science and science achievement in Australia and other western countries. As a result, there have been calls to investigate factors at both the student- and school-level that can improve intrinsic valuing of and achievement in science. Growth feedback from science teachers to students has been identified as one such factor. Growth feedback, which specifically targets individual student growth and improvement, is considered an effective form of teacher feedback. Because recent research has demonstrated the benefits of effective teacher feedback on intrinsic valuing of science and the positive link between intrinsic valuing of science and science achievement, the present investigation examined (at both the student- and school-level) the extent to which growth feedback in science predicts intrinsic valuing of science and the extent to which intrinsic valuing predicts science achievement and mediates the relationship between growth feedback and achievement. This study examined this hypothesized process with the 2015 Australian PISA sample (N = 14,530 students in N = 758 schools) via a multilevel structural equation model. Findings indicated that at both the student- and school-level, growth feedback significantly predicted intrinsic valuing, and intrinsic valuing significantly predicted achievement; growth feedback also had significant indirect effects of achievement via intrinsic valuing. Taken together, our findings indicate that there are personal and whole-school yields for science achievement from the experiences of growth feedback in and intrinsic valuing of science.     

Cyberbullying and Cybervictimization Within a Cross‐Cultural Context: A Study of Canadian and Tanzanian Adolescents

This study explored cyberbullying and cybervictimization (CBCV), for adolescents aged 11–15 from Tanzania (N = 426) and Canada (N = 592). Measurement invariance and model invariance was found for CBCV. In addition, multigroup structural equation modeling was used to explore several variables: age, gender, average hours online each day, accessing the Internet in a private location, having online privacy concerns, going online for social purposes, and motivation for cyberbullying. Results found interesting patterns within each country. It was found that cellphone ownership moderated the relation between these predictor variables and reported incidences of CBCV uniquely for each country. These findings provide evidence for the global nature of cyberbullying.     

Predicting teacher commitment: The impact of school climate and social–emotional learning

The aim of this study was to investigate whether school climate and social–emotional learning impact teacher commitment. The sample included 664 public schoolteachers from British Columbia and Ontario in Canada. Participants completed an online questionnaire about teacher commitment, school climate, and social–emotional learning. Binary logistic regression analyses showed that positive school climates significantly predicted three forms of teacher commitment: greater general professional commitment, future professional commitment, and organizational commitment. Of the school climate variables, student relations and collaboration among staff predicted commitment. In addition, stronger beliefs and integration of social–emotional learning predicted two types of teacher commitment: greater general professional commitment and organizational commitment. Of the social–emotional learning variables, the support and promotion of a social–emotional learning culture across the school and comfort with and regular implementation of social–emotional learning in the classroom predicted greater teacher commitment. Implications for practice and research are discussed. © 2011 Wiley Periodicals, Inc.     

Adaptability,engagement, and degree completion: a longitudinal investigation of university students*

University entry and the passage through university is a time of great change. The extent to which students are able to adjust to successfully navigate this change (adaptability) is likely to influence their academic outcomes. Prior research has identified a link between university students’ adaptability and academic achievement via behavioural engagement. The current longitudinal study extends this research by examining whether university students’ adaptability predicts degree completion via behavioural engagement. Undergraduate students (N = 186) were surveyed for their adaptability and behavioural engagement at degree commencement. Their completion status was extracted from the University Records System at the end of the degree. Findings showed that adaptability predicts both positive and negative behavioural engagement, and that negative (but not positive) behavioural engagement predicts degree completion. Adaptability was also found to influence degree completion indirectly via negative behavioural engagement. These findings hold important theoretical and practical implications for educators and researchers seeking to understand how students manage the transition to university and the extent to, and mechanisms by which students’ adaptability is associated with university degree completion.     

Adaptability,engagement and academic achievement at university

University entry is a time of great change for students. The extent to which students are able to effectively navigate such change likely has an impact on their success in university. In the current study, we examined this by way of adaptability, the extent to which students’ adaptability is associated with their behavioural engagement at university, and the extent to which both are associated with subsequent academic achievement. A conceptual model reflecting this pattern of predicted relations was developed and tested using structural equation modelling. First-year undergraduate students (N = 186) were surveyed for their adaptability and behavioural engagement at the beginning of their first year. Following this, students’ academic achievement was obtained from university records at the end of Semester 1 and 2 of first-year university. Findings showed that adaptability was associated with greater positive behavioural engagement (persistence, planning, and task management) and lower negative behavioural engagement (disengagement and self-handicapping). Moreover, negative behavioural engagement was found to inversely predict academic achievement in Semester 1, which predicted academic achievement in Semester 2. The educational implications of the findings are discussed.