Valued learning experiences of early career and experienced high-performance coaches

Background and purpose: This paper attempts to move the discussion of high-performance coach development from an examination of coaches' volume of experiences towards a consideration of the contribution of the learning experiences that coaches have reported throughout their careers. Furthermore, a discussion of proximal and distal guidance in the development of coaches was investigated. We examined the kinds of learning experiences within the framework of workplace learning and specifically the situated nature of learning and the view that learning occurs through social participation.

Method: Nineteen high-performance coaches participated in this study, including 10 scholarship and 9 mentor coaches (MCs). Participants rated a list of 14 developmental activities derived from empirical research on a seven-point Likert scale (0?=?not used, 1?=?of little value, to 7?=?extremely valuable). Each participant coach rated the 14 (guided, unguided) activities in the first two years of their coaching career, middle two years, and final two years. To analyse the data and identify the key trends for both the scholarship and MCs we examined statistical differences between scores for each of the sources the non-parametric Friedman test was used (p?<?.01). Significant χ² results were followed up with the Wilcoxon (two-tailed) T-test (p?<?.05) to identify statistically significant differences between scores at different time intervals.

Results: Three key findings emerged from these data: (i) reported increased valuing of a range of developmental experiences over time; (ii) temporal variance in the value of different learning sources at different stages of their careers; and (iii) an acknowledgement of the shift away from an emphasis on proximal learning sources for the MC and the shift towards proximal sources for the scholarship coach.     

Attitudes toward science: measurement and psychometric properties of the Test of Science-Related Attitudes for its use in Spanish-speaking classrooms

Understanding attitudes toward science and measuring them remain two major challenges for science teaching. This article reviews the concept of attitudes toward science and their measurement. It subsequently analyzes the psychometric properties of the Test of Science-Related Attitudes (TOSRA), such as its construct validity, its discriminant and concurrent validity, and its reliability. The evidence presented suggests that TOSRA, in its Spanish-adapted version, has adequate construct validity regarding its theoretical referents, as well as good indexes of reliability. In addition, it determines the attitudes toward science of secondary school students in Santiago de Chile (n?=?664) and analyzes the sex variable as a differentiating factor in such attitudes. The analysis by sex revealed low-relevance gender difference. The results are contrasted with those obtained in English-speaking countries. This TOSRA sample showed good psychometric parameters for measuring and evaluating attitudes toward science, which can be used in classrooms of Spanish-speaking countries or with immigrant populations with limited English proficiency.     

READING MATHEMATICS REPRESENTATIONS: AN EYE-TRACKING STUDY

We use eye tracking as a method to examine how different mathematical representations of the same mathematical object are attended to by students. The results of this study show that there is a meaningful difference in the eye movements between formulas and graphs. This difference can be understood in terms of the cultural and social shaping of human perception, as well as in terms of differences between the symbolic and graphical registers.

     

Corporate governance and innovation: The UK compared with the US and ‘insider’ economies

How well does the UK corporate governance and financial system (CG&FS) support and encourage innovation? Each CG&FS faces four challenges which vary by sector: novelty, reconfiguration, visibility and spill-overs. High novelty in technologies and markets requires high industry-wide expertise; need for radical reconfiguration requires strong pressure for shareholder value. Low visibility of innovation processes requires shareholder engagement; high spill-overs to and from stakeholders require substantial stakeholder inclusion. The UK CG&FS is rated in these terms against the US and ‘insider’ economies, drawing on recent fieldwork, and the ratings are shown to account well for the relative R&D intensity and specialisation of UK-owned firms.     

Aerobic training but no resistance training increases SIRT3 in skeletal muscle of sedentary obese male adolescents

In recent years, prevalence of obesity in children and adolescents has increased. A strategy for prevention and management of obesity is aerobic training (AT) due to its effectiveness to decrease fat mass. AT increases the content of SIRT3, a mitochondrial protein that increases the expression of PGC-1α and NFR1, thereby enhances mitochondrial function and metabolic health. Resistance training (RT) provides metabolic benefits but its effect on SIRT3 content is unknown. To compare the effect of AT and RT on SIRT3, PGC-1α and NRF-1 protein levels in skeletal muscle of sedentary obese adolescents. Twenty-seven sedentary obese male adolescents (age: 16.7?±?0.9 years; BMI: 33.7?±?4.3?kg/m²) completed a 1-month control period prior to randomization to one of two supervised exercise protocols: AT (3 days/week, 40 min/day, 70–80% peak heart rate) or RT (3 days/week, 11 exercises, 2 sets/exercise, 12 repetitions/set) for 12 weeks. Biopsies were obtained from the vastus lateralis muscle before and after 12 weeks to analyse SIRT3, PGC-1α and NRF-1 proteins content. Peak oxygen consumption (VO_2peak) and anthropometric variables were evaluated before and after training. AT increased SIRT3 content, which was associated with improvements in PGC-1α content and body fat percentage. RT did not affect SIRT3 or PGC-1α. VO_2peak increased only in AT. The increase in muscle mitochondrial SIRT3 was observed only following AT. In contrast, RT increased muscle mass without improving SIRT3 in obese male adolescents.