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RISS 인기검색어
- 검색키워드
- 저자 : Lorimer, George H. (검색결과 7 건)
- 무료
- 기관 내 무료
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Coaches as a Potential Source of Athletes’ Self-Presentational Concern
Ross Lorimer 한국코칭능력개발원 2014 International Journal of Coaching Science Vol.8 No.1
This study examined the association between athletes’ perceptions of their coaches’ views of the quality of their coach-athlete relationship (i.e., an athlete’s meta-perception) and athletes’ self-presentational concerns related to their coach. 119 athletes completed a modified version of the Self-Presentation in Sport Questionnaire (Wilson & Eklund, 1998) and the meta-version of the Coach-Athlete Relationship Questionnaire (Jowett, 2009). All self-presentational concerns were negatively associated with increased perceptions of closeness and positively associated with increased perceptions of commitment. Athletes appear to perceive their coach as a potential source of self-presentational concern and that these concerns are associated with inferences about their coaches’ perception of the quality of that relationship. This suggests that a coach needs to be aware that how an athlete perceives the coach’s perception of the quality of the relationship can potentially impact on the concerns experienced by that athlete.
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The interdependence of coaches’ and athletes’ perceptions and satisfaction with performance
Ross Lorimer 한국코칭능력개발원 2011 International Journal of Coaching Science Vol.5 No.2
This study investigated the interdependence of coaches’ and athletes’ perceptions of the athletes’ performance and their association with coaches’ and athletes’ satisfaction with the athletes’ performance. One-hundred coach-athlete dyads completed the performance subscale of the Athlete Satisfaction Questionnaire (Riemer & Chelladurai, 1998) and the performance subscale of the Elite Athlete Self-Description Questionnaire (Marsh, Hey, Johnson, & Perry, 1997). The results of a structural equation model analysis indicated a level of interdependence between the paired coach and athlete variables. There was a significant association between individual’s own perceptions of performance and satisfaction with performance. Additionally, coaches’ perceptions of performance were significantly associated with athletes’ satisfaction with performance, whereas athletes’ perceptions of performance were not associated with coaches’ satisfaction with performance. These results are discussed based on issues they raise for theory and practice.
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Are coach education programmes the most effective method for coach development?
Jordan Maclean,Ross Lorimer 한국코칭능력개발원 2016 International Journal of Coaching Science Vol.10 No.2
The purpose of this study is to establish whether coaches from a multi-sport context develop most effectively through coach education programmes and whether formal learning is fostering coach effectiveness. A sample of eight qualified male multi-sports’ coaches participated with an age range of 24 to 52 years (M = 32.6, ± = 8.9) and 9 to 18 years coaching experience (M = 12.6, ± = 3.8). Qualitative semi structured interviews were employed, lasting approximately 30 to 60 minutes. The data then underwent a thematic analysis process reducing the data into six overarching themes: values of the coach; the coach’s role on athlete development; forms of learning; barriers regarding coach education; role of governing bodies; coaches career pathway. The findings of the study indicated coaches access a wide range of sources to enhance their practice, but informal learning was preferred (interacting with other coaches and learning by doing). This resulted from numerous barriers experienced surrounding the delivery, cost and access to coach education programmes preventing coaches from progressing through the pathway. However, coaches in the study feel coach education should be a mandatory process for every coach. The findings have implications for policymakers and sport organisations in developing their coach education structure.
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S. Jowett,X. Yang,R. Lorimer 한국코칭능력개발원 2012 International Journal of Coaching Science Vol.6 No.2
The present study, guided by Integrated Research Model of coach-athlete relationships, investigated the linear associations between personality, relationship quality, perceptions of coach empathy, and satisfaction with training. A total of 178 athletes completed a self-report instrument that assessed the main variables of the study. Structural equation modelling supported that (a) athletes’ perceptions of relationship quality was affected by their personality and affected their views about how empathic their coach was relative to them, and (b) athletes’ perceptions of coach empathy was affected by their perceptions of the quality of the relationship with the coach and affected their levels of satisfaction with training. In conclusion, this demonstrates an integrated approach to investigating the associations between antecedent, quality, and consequent variables of the coach-athlete relationship.
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Chakrabarti, Shaon,Hyeon, Changbong,Ye, Xiang,Lorimer, George H.,Thirumalai, D. National Academy of Sciences 2017 PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF Vol.114 No.51
<P><B>Significance</B></P><P>Molecular chaperones have evolved to assist the folding of proteins and RNA, thus avoiding the deleterious consequences of misfolding. Thus, it is expected that increasing chaperone concentrations should enhance the yield of native states. While this has been observed in GroEL-mediated protein folding, experiments on <I>Tetrahymena</I> ribozyme folding assisted by CYT-19 surprisingly show the opposite trend. Here, we reconcile these divergent experimental observations by developing a unified theory of chaperone-assisted protein and RNA folding. We show that these ATP-fueled machines drive their substrates out of equilibrium, maximizing the nonequilibrium native yield in a given time rather than the absolute yield or folding rate. The theory predicts that in vivo the number of chaperones is regulated to optimize their functions.</P><P>Molecular chaperones facilitate the folding of proteins and RNA in vivo. Under physiological conditions, the in vitro folding of <I>Tetrahymena</I> ribozyme by the RNA chaperone CYT-19 behaves paradoxically; increasing the chaperone concentration reduces the yield of native ribozymes. In contrast, the protein chaperone GroEL works as expected; the yield of the native substrate increases with chaperone concentration. The discrepant chaperone-assisted ribozyme folding thus contradicts the expectation that it operates as an efficient annealing machine. To resolve this paradox, we propose a minimal stochastic model based on the Iterative Annealing Mechanism (IAM) that offers a unified description of chaperone-mediated folding of both proteins and RNA. Our theory provides a general relation that quantitatively predicts how the yield of native states depends on chaperone concentration. Although the absolute yield of native states decreases in the <I>Tetrahymena</I> ribozyme, the product of the folding rate and the steady-state native yield increases in both cases. By using energy from ATP hydrolysis, both CYT-19 and GroEL drive their substrate concentrations far out of equilibrium, thus maximizing the native yield in a short time. This also holds when the substrate concentration exceeds that of GroEL. Our findings satisfy the expectation that proteins and RNA be folded by chaperones on biologically relevant time scales, even if the final yield is lower than what equilibrium thermodynamics would dictate. The theory predicts that the quantity of chaperones in vivo has evolved to optimize native state production of the folded states of RNA and proteins in a given time.</P>
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