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41.
Vassilis Barkoukis Lauren Brooke Nikos Ntoumanis Brett Smith Daniel F. Gucciardi 《Journal of sports sciences》2013,31(21):2483-2491
ABSTRACTThe present study investigated athletes’ and coaches’ beliefs about the role of athletes’ entourage in deterring or promoting doping. Competitive athletes and coaches in Greece and Australia took part in semi-structured interviews. Our analysis of the interviews produced five main themes: coach influence, peer influence, doping stance, doping stigma, and entourage’s culture. Overall, coaches and peers having a close and trusty relationship with the athletes were considered most influential with respect to doping-related decisions. The majority of the athletes held a strong anti-doping stance but could not articulate why they held this position. This inability could be ascribed to the stigmatization of doping which led to lack of knowledge and anti-doping education. Finally, an anti-doping culture in the athletes’ environment was considered central to an anti-doping stance. The study findings provide valuable information towards a comprehensive understanding of the role athletes’ entourage can play in shaping athletes’ attitudes and decision for doping. 相似文献
42.
Constantine Skordoulis Theodore Vitsas Vassilis Dafermos Eugenia Koleza 《International Journal of Science and Mathematics Education》2009,7(2):253-272
The concept of dimension, one of the most fundamental ideas in mathematics, is firmly rooted in the basis of the school geometry
in such a way that mathematics teachers rarely feel the need to mention anything about it. However, the concept of dimension
is far from being fully understood by students, even at the college level. In this paper, we examine whether the Cartesian
x-y plane is responsible for student difficulty in estimating the value of the dimension of an object, or is it only students
misconceptions about dimension that lead them to a false estimation of the value of the dimension of various objects. A second
question discussed in this paper examines whether the system of coordinates acts as an epistemological obstacle or whether
it has only a didactical character. 相似文献
43.
Vassilis Barkoukis George Grouios Georgios Sideridis 《Assessment in Education: Principles, Policy & Practice》2008,15(1):39-55
Self‐determination theory provides an integrated conception of school‐ and academic motivation. The theory proposes a continuum comprising three types of motivation: intrinsic motivation (IM), extrinsic motivation (EM), and amotivation (AM), characterised by seven dimensions (IM = to know, to accomplish and to experience stimulation, EM = external regulation, introjection and identification, and Amotivation). The purpose of the present study was to examine the psychometric properties of the Academic Motivation Scale (AMS) with Greek high school students. Two studies were conducted to examine the factorial, construct, concurrent and predictive validity of the scale along with its reliability properties. Confirmatory factor analyses supported the proposed seven‐factor structure. The scale showed satisfactory levels of internal consistency and temporal stability. Additionally, indices of the scale’s construct, concurrent, and predictive validity were in the desired direction. These findings support the use of the Greek version of the AMS for the assessment of intrinsic motivation, extrinsic motivation, and amotivation. 相似文献