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排序方式: 共有193条查询结果,搜索用时 15 毫秒
111.
Iris Güldenpenning Mustafa Alhaj Ahmad Alaboud Wilfried Kunde Matthias Weigelt 《Sportwissenschaft》2018,48(3):366-375
In basketball, the defender’s reaction to a pass is slower and more error prone if the attacking player gazes into the opposite direction. This so-called head-fake effect might be modulated by context information, that is, the frequency and the sequence of head fakes occurring. Accordingly, the present study investigates the head-fake effect for different frequency proportions (20% vs. 50% vs. 80%). The results show that the head-fake effect decreases when the head fake occurs more often. Furthermore, a potential influence of previous fake experience (i.e., congruency-sequence effect) on the size of the head-fake effect was investigated. Importantly, previous fake experience did not cause the frequency-based modulation of the general size of the head-fake effect. These findings bare important implications for sports practice, especially when it comes to instructing players about the tactical use of deceptive actions. 相似文献
112.
Barbara E. Ainsworth Kathleen B. Watson Kate Ridley Karin A. Pfeiffer Stephen D. Herrmann Scott E. Crouter 《Research quarterly for exercise and sport》2018,89(3):273-281
Purpose: The purposes of this article are to: (a) describe the rationale and development of the Youth Compendium of Physical Activities (Youth Compendium); and (b) discuss the utility of the Youth Compendium for audiences in research, education, community, health care, public health, and the private sector. Methods: The Youth Compendium provides a list of 196 physical activities (PA) categorized by activity types, specific activities, and metabolic costs (youth metabolic equivalents of task [METy]) as measured by indirect calorimetry. The utility of the Youth Compendium was assessed by describing ways in which it can be used by a variety of audiences. Results: Researchers can use METy values to estimate PA levels and determine changes in PA in intervention studies. Educators can ask students to complete PA records to determine time spent in physical activities and to identify health-enhancing activities for classroom PA breaks. Community leaders, parents, and health care professionals can identify activity types that promote healthful behaviors. Public health agencies can use the METy values for surveillance and as a resource to inform progress toward meeting national physical activity guidelines. Applications for the private sector include the use of METy in PA trackers and other applications. Conclusion: The National Collaborative on Childhood Obesity Research Web site presents the Youth Compendium and related materials to facilitate measurement of the energy cost of nearly 200 physical activities in children and youth. The Youth Compendium provides a way to standardize energy costs in children and youth and has application for a wide variety of audiences. 相似文献
113.
The many adverse effects of child maltreatment make the scientific investigation of this phenomenon a matter of vital importance. Although the relationship between maltreatment and problematic emotion reactivity and regulation has been studied, the strength and specificity of these associations are not yet clear. We examine the magnitude of the maltreatment—child-emotion reactivity/regulation link. Studies with substantiated maltreatment involving children aged up to 18 were included, along with a smaller number of longitudinal studies (58 papers reviewed, encompassing more than 11,900 children). In comparison to nonmaltreated children, maltreated children experience more negative emotions, behave in a manner indicative of more negative emotion, and display emotion dysregulation. We outline several theoretical implications of our results. 相似文献
114.
Gavin W. Fulmer Iris C.H. Lee Kelvin H.K. Tan 《Assessment in Education: Principles, Policy & Practice》2015,22(4):475-494
We present a multi-level model of contextual factors that may influence teachers’ assessment practices, and use this model in a selected review of existing literature on teachers’ assessment knowledge, views and conceptions with respect to these contextual factors. Adapting Kozma’s model, we distinguish three levels of influence on teachers’ practices: micro, meso and macro. We searched for relevant articles in EBSCO, JSTOR and other databases, and review selected articles with a focus on the complex relationships within and across these levels. Findings reveal a large body of research at the micro-level (teacher), such as on teachers’ values, conceptions and knowledge. However, there is relatively less research at the meso-level (school) or connecting it with the micro- or macro-levels. Implications for future research are also discussed. 相似文献
115.
Lea Sarrar Dipl.-Psych. Nora Schneider Verena Bayios Ernst Pfeiffer Ulrike Lehmkuhl 《Sportwissenschaft》2010,40(4):262-267
The controversy surrounding the role of competitive sports in the development of eating disorders has increased in recent decades. There are inconsistent findings in the literature concerning the relationship between eating disorders and competitive sports, especially aesthetic sports. The aim of this study was therefore to assess eating disorder-related psychopathology in a sample of competitive figure skaters (FS) representative for competitive aesthetic sports. Special attention is paid to the investigation of body image and body satisfaction. Patients with anorexia nervosa (AN) and a healthy control group (CG) served as comparison groups. None of the FS met the complete diagnostic criteria for an eating disorder. Furthermore no significant differences were observed between the FS and the CG regarding body image and body satisfaction. However, a significant difference was detected compared to the AN patients. Our results underline the necessity for a differentiated analysis and careful diagnostics of sport-specific aspects when considering eating disorder-related psychopathology in competitive sports. 相似文献
116.
Catherine Gammon Karin A. Pfeiffer Anamaria Kazanis Jiying Ling 《Journal of sports sciences》2017,35(1):29-34
Cardiorespiratory fitness affords health benefits to youth. Among females, weight-relative fitness declines during puberty and is lower among African American (AA) than Caucasian girls. Data indicate racial differences in pubertal timing and tempo, yet the interactive influence of puberty and race on fitness, and the role of physical activity (PA) in these associations have not been examined. Thus, independent and interactive associations of race and pubertal development with fitness in adolescent girls, controlling for PA were examined. Girls in grades 5–8 (n = 1011; Caucasian = 25.2%, AA = 52.3%, Other Race group = 22.5%) completed the Pubertal Development Scale (pubertal stage assessment) and Fitnessgram® Progressive Aerobic Cardiovascular Endurance Run (PACER) test (cardiorespiratory fitness assessment). PA was assessed by accelerometry. Bivariate and multivariate analyses were used to examine associations among race, pubertal stage and fitness, controlling for vigorous PA, AA, and pubertally advanced girls demonstrated lower fitness than Caucasian and less mature counterparts. Puberty and race remained significantly associated with fitness after controlling for vigorous PA. The interaction effect of race and puberty on fitness was non-significant. The pubertal influence on fitness is observed among AA adolescents. Associations between fitness and race/puberty appear to be independent of each other and vigorous PA. Pubertally advanced AA girls represent a priority group for fitness interventions. 相似文献
117.
118.
Payn T Pfeiffer KA Hutto B Vena JE LaMonte MJ Blair SN Hooker SP 《Research quarterly for exercise and sport》2008,79(2):128-132
The relationship between average daily step counts and age, body mass index (BMI), self-reported physical activity (PA) level, and perceived health was determined in 85 middle-aged and older adults who wore a pedometer for 7 consecutive days. Average daily steps were significantly (p < .05) correlated with BMI (r = -.26), age (r = -.44) and perceived health (r = .53) but not with self-reported PA level (r = .19). The adjusted percentage of participants classified as meeting the PA recommendation in < or = 5,000, 5,001-9,999, and > or = 10,000 steps/day categories ranged from 53 to 61%. These findings support previous evidence in younger populations suggesting that the recommended minimal level of health-related PA may be achieved despite not accumulating 10,000 steps/day. 相似文献
119.
120.
Sander Thomaes Iris Charlotte Tjaarda Eddie Brummelman Constantine Sedikides 《Child development》2020,91(6):2211-2220
Children with negative competence beliefs often achieve below their potential in school. This randomized field experiment tested whether engaging in positive self-talk may benefit these children’s mathematics performance. Participants (N = 212, Grades 4–6, Mage = 10.6) worked on the first half of a standardized mathematics test, engaged in effort self-talk (“I will do my very best!”), ability self-talk (“I am very good at this!”), or no self-talk, and worked on the second half of the test. Compared to both the conditions, effort self-talk benefited the performance of children holding negative competence beliefs: It severed the association between negative competence beliefs and poor performance. By internally asserting that they will deliver effort, children with negative competence beliefs can optimize their achievement in school. 相似文献