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Considerable research has documented that successful performance in interceptive tasks (such as return of serve in tennis) is based on the performers’ capability to capture appropriate anticipatory information prior to the flight path of the approaching object. Athletes of higher skill tend to fixate on different locations in the playing environment prior to initiation of a skill than their lesser skilled counterparts. The purpose of this study was to examine visual search behaviour strategies of elite (world ranked) tennis players and non-ranked competitive tennis players (n = 43) utilising cluster analysis. The results of hierarchical (Ward’s method) and nonhierarchical (k means) cluster analyses revealed three different clusters. The clustering method distinguished visual behaviour of high, middle-and low-ranked players. Specifically, high-ranked players demonstrated longer mean fixation duration and lower variation of visual search than middle-and low-ranked players. In conclusion, the results demonstrated that cluster analysis is a useful tool for detecting and analysing the areas of interest for use in experimental analysis of expertise and to distinguish visual search variables among participants’.  相似文献   
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TELEVISION AND BEHAVIOR: TEN YEARS OF SCIENTIFIC PROGRESS AND IMPLICATIONS FOR THE EIGHTIES (Washington: Government Printing Office, 1982—price not given, paper, two vols)

John P. Murray, TELEVISION & YOUTH: 25 YEARS OF RESEARCH & CONTROVERSY (Bowys Town Center for the Study of Youth Development, Research Use and Public Service Division, Boys Town, Neb. 68010—$10.00, paper)

TELEVISION'S IMPACT ON CHILDREN AND ADOLESCENTS: A SPECIAL INTEREST RESOURCE GUIDE IN EDUCATION (Oryx Press, 2214 N. Central at Encanto, Phoenix, Az. 85004—price not given, paper)  相似文献   
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Abstract

Students develop robust mental models of teaching and learning during their school years, and as such, often teach as they were taught—possibly perpetuating practices that limit intellectual inquiry in classrooms. This paper reports on an analysis, using a conceptual framework and NUD?1ST software, of a cohort of 3rd‐year teacher education students' reflections on changes in their mental models following their experiences in a problem‐based learning (PBL) topic. Results provide evidence that students do report changing mental models in areas such as (a) the value of case studies for engaging with subject content, motivating learning, and connecting theory with practice; (b) self‐reflection and peer collaboration for cognitive and professional growth; and (c) processes of inquiry for developing self‐regulated learning practices.  相似文献   
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This study is designed to identify the underlying satisfaction dimensions gained through engagement in target shooting as a serious leisure pastime. The instrument design was based on the Leisure Satisfaction Scale. A total of 5502 useable surveys were collected through the Internet and a website related to target shooting and gun ownership. The results revealed eight dimensions: self-actualization, social interaction, location aesthetic, respite, physical benefit, connection and hedonic pleasure, which supplied the primary satisfiers of engaging in target shooting as a serious leisure activity. The demographic profile and dimensions of satisfaction may serve to dispel commonly held stereotypes of shooting hobbyists and those involved in gun ownership. The findings have important implications for leisure researchers and practitioners, to industry, both leisure and firearm related, and the target shooting community at large. This study adds to the literature of both target shooting and serious leisure.  相似文献   
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Data on 1, 146 families with a child age 3 through 17 at home are presented. Child abuse information was obtained for a randomly selected child in each family. Child abuse was defined as an attack by a parent involving punching, kicking, biting, hitting with an object, “beating up,” or using a knife or gun. Over 14 out of every 100 American children 3–17 are subjected to abusive violence each year. These figures are at least 26 times greater than those of the National Center For Child Abuse and Neglect. Even so, for reasons outlined in the paper, they are underestimates. Families in which child abuse occurred are compared with other families. The results suggest that child abuse is brought about by the very nature of the society and its family system. This has profound implications for the prevention and treatment of child abuse. Although psychotherapy may be appropriate in some cases, a more fundamental approach lies in such things as a more equal sharing of the burdens of child care, replacement of physical punishment with non-violent methods of child care and training, eliminating the stresses and insecurity which now characterize our economic system, and strengthening the ties of individual families to the extended family and the community.  相似文献   
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The Urban Review - Research stresses a need for more contextually nuanced urban teacher preparation programs that explore racially oppressive structures in society. This article presents a case...  相似文献   
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Rats were required in three experiments to find one of two submerged platforms that were situated in the same pair of diagonally opposite corners of a rectangular grey swimming pool. The experimental groups were trained with landmarks, comprising A4 cards attached to the walls, located in the corners containing the platforms. For the control groups, the landmarks were situated in the corners containing the platforms for half of the trials, and in the other corners for the remaining trials. Learning about the positions of the platforms with reference to the shape of the pool was overshadowed in the experimental groups when the landmarks were white, and enhanced when the landmarks were black. A fourth experiment assessed whether geometric cues influenced the control acquired by the landmarks. As in the previous experiments, the presence of the geometric cues overshadowed learning about the landmarks when they were white, but enhanced learning when the landmarks were black.  相似文献   
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