排序方式: 共有77条查询结果,搜索用时 250 毫秒
41.
Nikos L. D. Chatzisarantis Christina Frederick Stuart J. H. Biddle Martin S. Hagger Brett Smith 《Journal of sports sciences》2013,31(6):699-709
Abstract In the present study, we examined the utility of volitional and forced intentions in predicting participation in physical activities and effort within the theory of planned behaviour. Four hundred and forty-four participants (184 males, 260 females) aged 19.1 ± 3.3 years (mean ± s) completed self-report measures of intentions, attitudes, subjective norms, perceived behavioural control, volitional intentions, forced intentions, and past behaviour in a physical activity context. Six weeks later, they completed self-report measures of physical activity behaviour and effort. Results indicated that volitional intentions and forced intentions contributed to the prediction of effort over and above intentions, attitudes, subjective norms, perceptions of control, past behaviour, and the product terms of attitudes×intentions and subjective norms×intentions. Volitional intentions and forced intentions did not predict participation in physical activities over and above effort. We concluded that volitional intentions and forced intentions assist in the explanation of effort in the context of physical activity behaviour. 相似文献
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Efthimis N. Efthimiadis Nicos Malevris Apostolos Kousaridas Alexandra Lepeniotou Nikos Loutas 《Information Retrieval》2009,12(3):352-379
The study reports on a longitudinal and comparative evaluation of Greek language searching on the web. Ten engines, five global
(A9, AltaVista, Google, MSN Search, and Yahoo!) and five Greek (Anazitisi, Ano-Kato, Phantis. Trinity, and Visto), were evaluated
using (a) navigational queries in 2004 and 2006; and (b) by measuring the freshness of the search engine indices in 2005 and
2006. Homepage finding queries for known Greek organizations were created and searched. Queries included the name of the organization
in its Greek and non-Greek, English or transliterated equivalent forms. The organizations represented ten categories: government
departments, universities, colleges, travel agencies, museums, media (TV, radio, newspapers), transportation, and banks. The
freshness of the indices was evaluated by examining the status of the returned URLs (live versus dead) from the navigational
queries, and by identifying if the engines have indexed 32480 active (live) Greek domain URLs. Effectiveness measures included
(a) qualitative assessment of how engines handle the Greek language; (b) precision at 10 documents (P@10); (c) mean reciprocal
rank (MRR); (d) Navigational Query Discounted Cumulative Gain (NQ-DCG), a new heuristic evaluation measure; (e) response time;
(f) the ratio of the dead URL links returned, (g) the presence or absence of URLs and the decay observed over the period of
the study. The results report on which of the global and Greek search engines perform best; and if the performance achieved
is good enough from a user’s perspective. 相似文献
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希腊职业篮球俱乐部组织比赛前的季前训练,无论是国家队还是俱乐队都多次在欧洲比赛中取得优异成绩。季前训练包括基础训练、提高运动员的身体素质和比赛的必胜心。通过跟踪训练和巡回参赛,运动员的个人素质和球队的整体素质都得到进一步提高。文章探讨了参加季前训练、教练员为提高运动状态、运动员个体素质和整体素质所采取的措施,指出季前训练的重要性和效果。 相似文献
45.
Alexander T. Latinjak Miquel Torregrossa Nikos Comoutos Cristina Hernando-Gimeno Yago Ramis 《Journal of sports sciences》2019,37(12):1429-1433
This study examined how goal-directed self-talk may help basketball players to self-regulate in stereotypical competitive situations: seconds before a challenging game, while clearly winning or clearly losing, and at the close of a tight game. Participants were recruited in groups of three to four, until preliminary inspection of the data indicated that data saturation was reached. In the end, 34 basketball players voluntarily took part in individual interviews, writing up to three self-instructions they had used in each of the four competitive situations to self-regulate. Content analyses revealed that self-talk in competitive basketball situations serves cognitive functions (e.g., regulating cognition and behaviour), motivational functions (e.g., promoting mastery goals) and emotion and activation-regulating functions (e.g., creating activated states). More specifically, the results also indicated that athletes’ self-talk may serve functions specific to the psychological demands experienced in each situation. It is argued that knowing how athletes counsel themselves, could prove important for applied sport psychologists to design psychological skill training. 相似文献
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Grounded in self-determination theory (Deci & Ryan, 1985) and the self-concordance model (Sheldon & Elliot, 1999), this study examined the motivational processes underlying goal striving in sport as well as the role of perceived coach autonomy support in the goal process. Structural equation modeling with a sample of 210 British athletes showed that autonomous goal motives positively predicted effort, which, in turn, predicted goal attainment. Goal attainment was positively linked to need satisfaction, which, in turn, predicted psychological well-being. Effort and need satisfaction were found to mediate the associations between autonomous motives and goal attainment and between attainment and well-being, respectively. Controlled motives negatively predicted well-being, and coach autonomy support positively predicted both autonomous motives and need satisfaction. Associations of autonomous motives with effort were not reducible to goal difficulty, goal specificity, or goal efficacy. These findings support the self-concordance model as a framework for further research on goal setting in sport. 相似文献
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Maria Limniou Nikos Papadopoulos David Roberts 《Education and Information Technologies》2007,12(4):229-244
In a chemistry instrumentation course, the teachers explain to students how instruments function and which their basic technical
principles are. We integrated an interactive UV-Visible spectrophotometer simulator into a chemical instrumentation course
in an attempt to improve the teaching procedure. The students were divided into two groups, the experimental group (EG) and
the control group (CG). The students of EG participated in an instrumentation course in which we distributed to them the components
of an old spectrophotometer and presented them with figures and animations about the component’s functions using Power-Point
presentation. During the presentation a discussion took place and we posed questions to the students in order to make them
think about the technical principles of the UV-Visible spectrophotometer. After the presentation, the students performed virtual
experiments using UV-Vis spectrophotometer simulator on personal Computers and they shared measurements, observations and
conclusions about their experiments using the LAN (local area network). In the students of CG we presented the spectrophotometer
and its components following the traditional way, drawing the components’ function and the structure of instrument on the
blackboard. Comparison of the two groups showed that the EG students valued the opportunity to collaborate with other peers
during the lecture and also they found this teaching procedure useful. As a result they felt more confident to manipulate
a real instrument and the EG students better understood the function and the technical principles of the instrument than the
CG students.
相似文献
David RobertsEmail: |
48.
Karageorghis CI Priest DL Terry PC Chatzisarantis NL Lane AM 《Journal of sports sciences》2006,24(8):899-909
In the present study, a measure to assess the motivational qualities of music in exercise was redesigned, extending previous research efforts (Karageorghis et al., 1999). The original measure, the Brunel Music Rating Inventory (BMRI), had shown limitations in its factor structure and its applicability to non-experts in music selection. Redesign of the BMRI used in-depth interviews with eight participants (mean age 31.9 years, s = 8.9 years) to establish the initial item pool, which was examined using a series of confirmatory factor analyses. A single-factor model provided a good fit across three musical selections with different motivational qualities (comparative fit index, CFI: 0.95-0.98; standardized root mean residual, SRMR: 0.03-0.05). The single-factor model also demonstrated acceptable fit across two independent samples and both sexes using one piece of music (CFI: 0.86-1.00; SRMR: 0.04-0.07). The BMRI was designed for experts in selecting music for exercise (e.g. dance aerobic instructors), whereas the BMRI-2 can be used both by exercise instructors and participants. The psychometric properties of the BMRI-2 are stronger than those of the BMRI and it is easier to use. The BMRI-2 provides a valid and internally consistent tool by which music can be selected to accompany a bout of exercise or a training session. Furthermore, the BMRI-2 enables researchers to standardize music in experimental protocols involving exercise-related tasks. 相似文献
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Developing upon cross-sectional research (Smith, Ntoumanis, & Duda, 2007) supporting the self-concordance model (Sheldon & Elliot, 1999) as a framework for contextual goal striving, the current study investigated the assumptions of the model in relation to season-long goal striving in sport. The study additionally examined the role of coping strategies in the persistence of goal-directed effort. Structural equation modeling analysis with a sample of 97 British athletes indicated that start-of-season autonomous goal motives were linked to midseason effort, which subsequently predicted end-of-season goal attainment. Attainment was positively related to changes in psychological need satisfaction, which, in turn, predicted changes in emotional well-being. In a second model, autonomous and controlled motives positively predicted task- and disengagement-oriented coping strategies, respectively. In turn, these strategies were differentially associated with effort. The findings provide support for contextual adaptations of the self-concordance model and demonstrate the role of coping strategies in the goal striving process. 相似文献