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Abstract Controversy surrounds the influence that caffeine has on accuracy and cognitive performance in precision activities such as shooting and archery. The aim of this study was to assess the effects of two doses of caffeine on shooting performance, reaction time, and target tracking times in the sport of clay target shooting. A randomized, double-blind, placebo-controlled design was undertaken by seven elite male shooters from the double-trap discipline. Three intervention trials (2 mg caffeine · kg?1 body mass (BM); 4 mg caffeine · kg?1 BM; placebo) were undertaken, in which shooters completed four rounds per trial of 50 targets per round. Performance accuracy (score) and digital video footage (for determination of reaction time and target tracking times) were gathered during competition. Data were analysed using repeated-measures analysis of variance. No differences in shooting accuracy, reaction time or target tracking times among the three intervention trials or across the four rounds within each intervention were observed (P > 0.05). The results indicate that ingestion of ≤4 mg caffeine · kg?1 BM does not provide performance benefits to elite performers of clay target shooting in the double-trap discipline. 相似文献
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Ursula Ferreira Julio Valéria Leme Gonçalves Panissa Bianca Miarka Monica Yuri Takito Emerson Franchini 《Journal of sports sciences》2013,31(2):212-218
Abstract In 2009, the International Judo Federation established a ranking system (RS) to classify athletes and to distribute the competitor quotas of the Olympic Games. However, the RS does not consider the home advantage. This issue has not been studied in judo, and its implications for the RS have not been determined. The objective was to verify the home advantage in judo in terms of winning a medal or the number of matches won. Therefore, 25 competitions that computed points for the RS in 2009 were analysed. Logistic regression analysis and the Poisson generalised linear model were used for the analyses, which included the relative quality of the athletes. The sample was composed only of athletes who had competed both at home and away. The odds ratio for winning medals was higher for athletes who competed at home for both males and females. The association between the number of matches won and competing at home was significant only for the male athletes. The home advantage was observed in the competitions that used the judo RS. Thus, it is likely that athletes from countries that host competitions using the RS have an advantage in terms of obtaining their Olympic classification. 相似文献
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Thomas Elbert Maggie Schauer Elisabeth Schauer Bianca Huschka Michael Hirth Frank Neuner 《Child abuse & neglect》2009,33(4):238-246
ObjectivesThe present study examined traumatic experiences, PTSD, and co-morbid symptoms in relation to neuropsychological and school performance in school children affected by two decades of civil war and unrest.MethodThe epidemiological survey of children's mental health included a representative sample of 420 school children. Local teachers were trained to administer a translation of the UCLA-PTSD Index Form. The instrument and the epidemiological findings were validated by assessment through clinical expert interview, school grades, and neuropsychological testing in a subsample (N = 67).ResultsNinety-two percent of the children surveyed had experienced severely traumatizing events such as combat, bombing, shelling, or witnessing the death of a loved one. Twenty-five percent met the criteria for a diagnosis of PTSD. Traumatized children reported lasting interference of experiences with their daily life, which was corroborated by memory testing, scores in school performance and ratings of social withdrawal. Depressive symptoms and poor physical health were frequent in these children. The majority of trained teachers achieved valid results in the structured interviews.ConclusionPerformance and functioning in children are related to the total load of traumatic events experienced. An important component of psychosocial programs in post-conflict areas should include increasing community-based awareness of the consequences of traumatic stress, both as a preventative measure and as a way of decreasing stigmatization of affected individuals. 相似文献
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Sleep Disturbance and Expressive Language Development in Preschool‐Age Children With Down Syndrome 
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下载免费PDF全文 Jamie O. Edgin Ursula Tooley Bianca Demara Casandra Nyhuis Payal Anand Goffredina Spanò 《Child development》2015,86(6):1984-1998
Recent evidence has suggested that sleep may facilitate language learning. This study examined variation in language ability in 29 toddlers with Down syndrome (DS) in relation to levels of sleep disruption. Toddlers with DS and poor sleep (66%, n = 19) showed greater deficits on parent‐reported and objective measures of language, including vocabulary and syntax. Correlations between sleep and language were found in groups with equivalent medical and social backgrounds and after control for relevant behavioral comorbidities, including autism symptoms. These results emphasize the important role of quality sleep in all children's expressive language development, and may help increase our understanding of the etiology of language deficits in developmental disorders, potentially leading to new treatment approaches. 相似文献
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Marinica Bianca V. Negru-Subtirica Oana 《International Journal for Educational and Vocational Guidance》2020,20(3):591-611
International Journal for Educational and Vocational Guidance - Volunteering can be a means of identity development in emerging adulthood and it can provide a protective environment for vocational... 相似文献
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Danielle Every Kirrilly Thompson Sophia Rainbird Steve Whetton Nicholas Procter Suraya Abdul-Halim Bianca Sebben 《The Australian Educational Researcher》2014,41(2):209-225
Under pressure from crowded immigration detention centres and an election commitment to remove children from detention, in 2010 the Australian government opened a low security immigration detention facility for families and children in the Adelaide Hills. Children from this alternative place of detention (APOD) attend nine local schools. However, many local residents feared their enrolment would create conflict, reduce educational outcomes for local students, and overburden teachers and school resources. To answer these concerns we conducted an ethnography of the schools and interviewed school teachers, principals, parents, the education managers in the Department of Immigration and Citizenship (DIAC) and the Department of Education and Children’s Services (DECS). This paper reports our findings on the impacts of the new arrivals on school finances, teacher time and resources, the local children, and the broader Hills community. As did previous quantitative studies, we found no negative effects. Rather, the new arrivals created a newly enriched learning environment and social experiences. The schools also played an integral role in changing the initially hostile community attitudes towards asylum seekers. Our qualitative research approach allowed us to explore factors that created this outcome. We found that the absence of negative impacts was the result of the funding for specialised support staff, the social justice orientation of the school’s leaders and staff, and a school-wide commitment to values of inclusivity and diversity. This research provides further empirical evidence on the impacts of immigration on education, increases our understanding of the factors that mediate these impacts, and provides a useful case study for schools that teach asylum seeker children. 相似文献
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Allan B. de Guzman Rochelle Gabrielle R. Gatan Ira Bianca Mae G. Gesmundo Astley Justine H. Golosinda 《Educational gerontology》2015,41(8):567-581
Despite numerous studies that examined the impact of separation and separation anxiety on the emotions and behavior of young individuals, little is known about separation anxiety in the elderly population. This grounded theory study purports to describe the process of separation anxiety among incarcerated Filipino elderly men. Individual interviews and participant observations were conducted with 25 incarcerated elderly Filipino men who are first-time prisoners and sentenced to lifetime imprisonment. Following Strauss and Corbin's (1998) coding protocol, a four-part process emerged to describe the studied layer of human experience. The Tectonic Model of Separation Anxiety among incarcerated Filipino elderly men comprises four phases: Winkling, Wilting, Weeding, and Weaving. Findings of this study invite nurses and other clinicians to identify developmentally appropriate strategies and interventions for this vulnerable and neglected sector of society. 相似文献
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Taking responsibility and creating social justice—in view of current social developments, e.g., the implementation of the UN Convention on the Rights of Persons with Disabilities or the influx of more than 1 million refugees in 2015—this demand is also becoming increasingly louder in the context of sport: different types of sport should help to solve social problems or to prevent social imbalances. To date, however, the assumption that sport can do justice to this task is empirically almost untenable. This article provides an introduction to modeling the topic of sport in social responsibility for the sport pedagogical discourse and presents action and research practices as well as research objectives using the example of a socially effective youth sport in school, clubs, and social work. Two research projects provide an example of the scientific contribution that sport pedagogy can make by examining approaches to sport-related social projects and their effectiveness. The evaluation of the WiO-Fit project was able to show how appropriate sport programs can “lure” socially and educationally disadvantaged youth who can be guided into appropriate coaching and counseling services, according to the individual problems outside of sports. The research results of the social project Gobox show the central role that intergenerational relationship management and language play when it comes to increasing the commitment of youth who would otherwise turn away from sports. This article not only highlights the potential of sport pedagogical research in this field, but also provides suggestions for interdisciplinary cooperation and research practice. 相似文献
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Bianca Fileborn Anthony Lyons Sharron Hinchliff Graham Brown Wendy Heywood Victor Minichiello 《Sex education》2017,17(2):165-179
This paper examines the preferred sexuality education sources of older Australian adults in later life. Drawing on findings from qualitative interviews with 30 men and 23 women aged 60 years and older, we consider the sources that participants currently use, or would like to use, in seeking information about sex. Where relevant, we examine participants’ experiences of learning about sex in later life using different sources, and the impact these had on their sexual expression, pleasure and well-being. Preferred sources of information include the Internet, the media, health care providers, books and workshops or discussion groups. A substantial number of participants did not actively seek information on sex. For those who had, these educational endeavours could profoundly shape their sexual practices. As such, learning about sex should be viewed as a lifelong endeavour. Our findings carry important implications for the development and delivery of sexuality education for older adults. 相似文献