The Fatimid Empire     

Harry Munt 《Al-Masaq: Islam & the Medieval Mediterranean》2019,31(1):114-115

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False-performance feedback does not affect punching forces and pacing of elite boxers     

Israel Halperin  Dale W. Chapman  Kevin G. Thompson  Chris Abbiss 《Journal of sports sciences》2019,37(1):59-66

Prior research indicates that providing participants with positive augmented feedback tends to enhance motor learning and performance, whereas the opposite occurs with negative feedback. However, the majority of studies were conducted with untrained participants performing unfamiliar motor tasks and so it remains unclear if elite athletes completing familiar tasks respond in a similar fashion. Thus, this study investigated the effects of three different versions of false-performance feedback on punching force (N), pacing (force over time) and ratings of perceived exertion (RPE) in 15 elite amateur male boxers. Athletes completed a simulated boxing bout consisting of three rounds with 84 maximal effort punches delivered to a punching integrator on four separate days. Day one was a familiarisation session in which no feedback was provided. In the following three days athletes randomly received false-positive, false-negative and false-neutral feedback on their punching performance between each round. No statistical or meaningful differences were observed in punching forces, pacing or RPE between conditions (P > 0.05; ≤ 2%). These null results could stem from the elite status of the athletes involved, the focus on performance rather than learning, or they may indicate that false feedback has a less potent effect on performance than previously thought.  相似文献   

Validity and reliability of a linear positional transducer across commonly practised resistance training exercises     

Harry F. Dorrell  Joseph M. Moore  Mark F. Smith  Thomas I. Gee 《Journal of sports sciences》2019,37(1):67-73

This study investigated the validity and reliability of the GymAware PowerTool (GPT). Thirteen resistance trained participants completed three visits, consisting of three repetitions of free-weight back squat, bench press, deadlift (80% one repetition maximum), and countermovement jump. Bar displacement, peak and mean velocity, peak and mean force, and jump height were calculated using the GPT, a three-dimensional motion capture system (Motion Analysis Corporation; 150 Hz), and a force plate (Kistler; 1500 Hz). Least products regression were used to compare agreeability between devices. A within-trial one-way ANOVA, typical error (TE; %), and smallest worthwhile change (SWC) were used to assess reliability. Regression analysis resulted in R² values of >0.85 for all variables excluding deadlift mean velocity (R² = 0.54–0.69). Significant differences were observed between visits 3-2 for bench press bar displacement (0.395 ± 0.055 m; 0.383 ± 0.053 m), and deadlift bar displacement (0.557 ± 0.034 m; 0.568 ± 0.034 m). No other significant differences were found. Low to moderate TE (0.6–8.8%) were found for all variables, with SWC ranging 1.7–7.4%. The data provides evidence that the GPT can be used to measure kinetic and kinematic outputs, however, care should be taken when monitoring deadlift performance.  相似文献   

Self-presentational concerns and competitive anxiety     

McGowan E  Prapavessis H  Wesch N 《运动与训练心理学杂志》2008,30(3):383-400

The purpose of this study was to improve understanding of the link between self-presentational concerns and competitive anxiety. Specifically, we examined (a) associations among self-presentational concerns and competitive state anxiety dimensional symptom responses using the modified Competitive State Anxiety Inventory-2 (CSAI-2; Martens, Vealey, & Burton, 1990) and (b) whether self-presentational concerns mediate trait-state anxiety relationships. In addressing these matters, we also examined the factor structure and composition of the Self-Presentation in Sport Questionnaire (SPSQ; Wilson & Eklund, 1998). Results showed that self-presentational concerns were positively associated with intensity and frequency dimensional symptoms and negatively associated with direction symptoms. Results also showed that self-presentational concerns demonstrated consistently higher associations with the cognitive component and the intensity symptom of the CSAI-2 state measures. Results showed no support for the notion that self-presentational concerns mediate the trait-state anxiety relationship. When examining the factor structure and composition of the SPSQ, the results from two independent athlete samples support the tenability of an abbreviated 21-item four-factor model. Thus the newly constituted scale is recommended for measuring self-presentational concerns in sport.  相似文献   

Immigrant perpetrators in the news: A terror management approach to resultant hostility,perceived vulnerability,and immigration issue judgment     

Po-Lin Pan  Shuhua Zhou  Marceline Thompson Hayes 《Journal of International and Intercultural Communication》2017,10(3):219-236

This study found that mortality salience in TV news activated more hostile attitude toward the perpetrators and negative judgment on the immigration issue. Social group difference influenced news viewers’ immigration issue judgment, but did not affect their resultant hostility and perceived vulnerability. More negative attitudes emerged toward the immigration issue when immigrant perpetrators were portrayed negatively in the news. News viewers with exposure to mortality salience in TV news reported more negative toward immigrants. Exposure to mortality-related elements in TV news could lead to social conflicts that were viewed as a severe threat by U.S. government and policymakers.  相似文献   

A validity study of the Kinetic school drawing technique     

H. Thompson Prout  David S. Celmer 《Psychology in the schools》1984,21(2):176-180

Kinetic School Drawings were obtained from 100 fifth-grade students. The drawings were analyzed along a number of dimensions thought to measure “negative” affect. Significant correlations with academic achievement were found for a number of measures, and the results of a stepwise multiple regression were significant. In general, the study supported the validity of the technique.  相似文献   

Audio-Visual Training in the Netherlands     

Harry J L Jongbloed 《Educational Media International》2013,50(2)

In 1972 the Netherlands Institute for Audio-Visual Media (NIAM) in the Hague established a new department in Rotterdam to provide information and advice on the selection of audiovisual equipment and training in the use and applications of the different media. The information service was to be provided free of charge, but a fee would be charge for the training courses.  相似文献   

Report on the ‘European exchange of experiences in school integration’: the intercultural comparison of the quality of life of children and youth with handicaps in Arhus (Denmark), Arezzo (Italy), Greenwich (London,UK) and Reutlingen (Germany)     

Harry Daniels  Bob Hogg 《欧洲特需教育杂志》2013,28(2):104-116

ABSTRACT

This article describes some aspects of a multi‐disciplinary exchange and research programme involving communities in Denmark, Germany, Italy and the United Kingdom. The major focus of the programme has been on the integration of children with special educational needs into mainstream settings in schools and communities with a specific reference to decision making processes. The point at which extra resources are given by the state and its agencies to an individual in need provides the unifying intercultural point of departure. Local cultures, including legislative and social imperatives, and their implications for research activity are discussed. Common themes in the transition and transformation of the various forms of welfare state provision within the member countries are identified and analysed. The relationship between different forms and levels of service provision and the practice of integration are discussed.  相似文献   

TAKE UP THE CHALLENGE     

Harry N. Rivlin 《Equity & Excellence in Education》2013,46(1):6-11

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Forum: Beyond 2000     

Harry Collins  Steven French  R. Millar  J. Osborne  W. F. Vinen  Philip Wright 《Studies in Science Education》2013,49(1):167-173

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