Creating environments in physical education (PE) that foster perceived competence and physical activity during gender-mixed game play lessons is a challenge, especially with adolescent girls. This study is a small experiment in one PE lesson that aimed to increase the perceived competence and in-class physical activity in girls, by applying a single-gender grouping strategy within co-educational classes. A final sample of 216 students (90 girls; 42%) within 13 classes in grades 7–9 (age 11–15) played basketball in mixed-gender and in single-gender teams. The effects on participant’s perceived competence and moderate-to-vigorous activity (MVPA) were assessed using questionnaires and heart rate monitors, respectively. Although girls’ perceived competence was lower than that of boys, girls’ perceived competence increased during single-gender game play. Physical activity levels were high during both mixed-gender and single-gender game play. Playing invasion games (i.e. basketball, handball, soccer) in gender-specific groups could be a useful strategy for PE teachers to implement into their lessons, in order to improve girls’ perceived competence during invasion games. https://doi.org/10.1177/1356336X13496000
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The objective of this study was to compose an objective and detailed notational analysis system for 3 vs. 2GK smallsided soccer games, in which three roles are examined: attacker with ball, attacker without ball and defender. The actions and the outcome of the actions were registered for each player and in each role. Players earn points for each action and outcome according to an a priori determined scheme. Performance scores for each role are calculated as the average number of points a participant earns per trial. This notation system was tested on 19 highly talented female soccer players and validity and reliability of the system were determined. In addition, practical applications were discussed and the most important items of the notation system were determined and using only these items, a simplified notation system was proposed. The notation system has high ecological validity and can discriminate the high and low categorized players, but further development is necessary to increase the reliability of the system.
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When defending against hostile enemies, individual group members can benefit from others staying in the group and fighting. However, individuals themselves may be better off by leaving the group and avoiding the personal risks associated with fighting. While fleeing is indeed commonly observed, when and why defenders fight or flee remains poorly understood and is addressed here with three incentivized and preregistered experiments (total n = 602). In stylized attacker-defender contest games in which defenders could stay and fight or leave, we show that the less costly leaving is, the more likely individuals are to abandon their group. In addition, more risk-averse individuals are more likely to leave. Conversely, individuals more likely stay and fight when they have pro-social preferences and when fellow group members cannot leave. However, those who stay not always contribute fully to group defense, to some degree free-riding on the efforts of other group members. Nonetheless, staying increased intergroup conflict and its associated costs.
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