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ABSTRACTThe concept of parental support in youth sport has been well studied, however, the measurement of the construct is not as advanced. Existing sport parenting literature has relied on study-designed instruments and/or psychometric instruments not developed or validated for use in the sport-specific context. The present multi-study research programme sought to develop and validate a theory-informed measure of parental support in youth sport. In study one, athletes’ perceptions of parental support were explored to gain an in-depth qualitative understanding of parental support. The findings from study one were subsequently utilised to inform the generation of initial scale items (70 items) which reflected parental support in study two. Content validity was then established during study two, through an expert panel of judges (n = 5) and members of the target population (n = 7). During study three, retained items (33 items) were administered to a sample of youth athletes (n = 318) for further item reduction and to explore the factor structure of the instrument, utilising exploratory factor analysis (EFA). In study four, a 19-item measure was administered to a second independent sample of youth athletes (n = 319), to confirm the factor structure of the instrument utilising confirmatory factor analysis (CFA). Following minor ad-hoc modifications, the final four-factor, 18-item YSPS-Q (autonomy; emotional; instrumental; informational support) demonstrated excellent model fit. Moreover, the 18-item YSPS-Q demonstrated good reliability, alongside convergent, and divergent validity. The YSPS-Q will enable researchers to effectively evaluate future parent-support programmes, and assist researchers in understanding what factors moderate its effectiveness.

ABSTRACTMany individuals are passionate for physical activity such as cycling, running, and soccer. Drawing from the dualistic model of passion, the purpose of the present study was to examine the direct and indirect relationships between passion (harmonious and obsessive) for physical activity, life satisfaction, performance, and innovativeness in organisational settings. Survey data were gathered from 272 cyclists who also occupied employment roles beyond their cycling pursuits. Data were analysed using structural equation modelling. Results indicated a direct positive relationship between harmonious passion and both performance and innovativeness at work. Moreover, results indicated that perceived life satisfaction indirectly influenced the relationships between harmonious passion and both performance and innovativeness at work. No significant relationships were found between obsessive passion for cycling and either organisational performance outcome. In sum, these findings suggest that passion for physical activity directly and indirectly (through life satisfaction) enhance organisational performance outcomes but only for harmonious passion.

High-quality single crystalline calcium fluoride (CaF2) has been of considerable practical concern as an optical lens to an excimer laser stepper in the deep-ultraviolet region due to its excellent transparency. Highly accurate thermophysical properties of molten CaF2are essential as input data for a numerical simulation of the crystal growth process. The density of molten CaF2has been successfully determined in the stable and undercooled liquid states (1600–1820 K) with an electrostatic levitator. The temperature dependence of the density of molten CaF2is given by $$\rho \hbox{/kg}\cdot \hbox{m}^{-3} = 3580-0.63T(\pm 1.6\% ).$$The coefficient of cubical expansion of molten CaF2has been determined to be $$\beta \hbox{/K}^{-\hbox{1}}=\frac{1}{5683-T}.$$High-quality single crystalline calcium fluoride (CaF2) has been of considerable practical concern as an optical lens to an excimer laser stepper in the deep-ultraviolet region due to its excellent transparency. Highly accurate thermophysical properties of molten CaF2are essential as input data for a numerical simulation of the crystal growth process. The density of molten CaF2has been successfully determined in the stable and undercooled liquid states (1600–1820 K) with an electrostatic levitator. The temperature dependence of the density of molten CaF2is given by $$\rho \hbox{/kg}\cdot \hbox{m}^{-3} = 3580-0.63T(\pm 1.6\% ).$$The coefficient of cubical expansion of molten CaF2has been determined to be $$\beta \hbox{/K}^{-\hbox{1}}=\frac{1}{5683-T}.$$

Resistance to macrolides among group A streptococci is an increasing problem worldwide. We examined 496 strains phenotypically and genotypically for resistance to erythromycin and clindamycin. Strains were isolated in five different geographical areas representing about 45% of the total Quebec population. The overall resistance rate was 4.6% but varied from 0% in rural areas to 9.4% in Montreal. Of the 23 strains showing resistance to erythromycin, 15 (65%) had an identical pulsed-field gel electrophoresis pattern, were of serotype M28T28 and harboured the erm(TR) gene, suggesting the spread of a single clone. Of the remaining eight strains, two strains had the erm(B) gene, five had the mef gene and one with a different serotype also had the erm(TR) gene.