排序方式： 共有60条查询结果，搜索用时 187 毫秒
51.
52.
Infants imitate others’ individual actions, but do they also replicate others’ joint activities? To examine whether observing joint action influences infants’ initiation of joint action, forty‐eight 18‐month‐old infants observed object demonstrations by 2 models acting together (joint action), 2 models acting individually (individual action), or 1 model acting alone (solitary action). Infants’ behavior was examined after they were given each object. Infants in the joint action condition attempted to initiate joint action more often than infants in the other conditions, yet they were equally likely to communicate for other reasons and to imitate the demonstrated object‐directed actions. The findings suggest that infants learn to replicate others’ joint activity through observation, an important skill for cultural transmission of shared practices. 相似文献
53.
54.
55.
MBA students rated their interests in eight subject areas and evaluated them in several aspects, such as logical appeal and contribution of perceived competence in a subject area due to self esteem. Affective reactions to the areas, and attitudes to grading and to surface vs depth learning were also measured. Interest was most strongly related to logical appeal of the subject area. LISREL modelling of the structure of the relationships showed that logical appeal, being intimately related to the contribution of competence to self esteem, occupied a central position. Interest was determined by several variables but had no further consequences in the model. Students who expressed a depth orientation to their work were more positive generally, more interested and invested more effort in their work. 相似文献
56.
Sigrun K. Ertesvåg Pamela Sammons Ulf Blossing 《British Educational Research Journal》2021,47(3):654-673
Mixed-methods (MM) designs have gained increasing interest in educational research. Still, many studies collect quantitative and qualitative data but report these data separately and do not attempt to integrate them in practice. The aim of this article is to discuss the purposes and processes of integrating qualitative and quantitative data in an MM classroom interaction study. Issues regarding mixing and integration, including how to overcome integration barriers, are discussed. Based on this outline, the study then presents details about the various integration processes adopted in a recent MM study on classroom interaction in Norway. The possibilities and challenges of integration to produce new knowledge and a deeper understanding throughout the research process in classroom studies are illustrated with a specific focus on points of interface. A key issue is whether the new knowledge obtained in an MM study is more than the sum of the individual quantitative and qualitative parts. Using selected questions from the MM alphabet proved a helpful heuristic for guiding the iterative processes of integration and provided richer explanations and an enhanced understanding of the implementation and impact of a complex classroom intervention initiative. The study provides a new methodological contribution to the MM literature by examining the integration processes and challenges faced in a specific study. 相似文献
57.
Gary O'Donovan Anthony J. Blazevich Colin Boreham Ashley R. Cooper Helen Crank Ulf Ekelund 《Journal of sports sciences》2013,31(6):573-591
Absract Our understanding of the relationship between physical activity and health is constantly evolving. Therefore, the British Association of Sport and Exercise Sciences convened a panel of experts to review the literature and produce guidelines that health professionals might use. In the ABC of Physical Activity for Health, A is for All healthy adults, B is for Beginners, and C is for Conditioned individuals. All healthy adults aged 18–65 years should aim to take part in at least 150 min of moderate-intensity aerobic activity each week, or at least 75 min of vigorous-intensity aerobic activity per week, or equivalent combinations of moderate- and vigorous-intensity activities. Moderate-intensity activities are those in which heart rate and breathing are raised, but it is possible to speak comfortably. Vigorous-intensity activities are those in which heart rate is higher, breathing is heavier, and conversation is harder. Aerobic activities should be undertaken in bouts of at least 10 min and, ideally, should be performed on five or more days a week. All healthy adults should also perform muscle-strengthening activities on two or more days a week. Weight training, circuit classes, yoga, and other muscle-strengthening activities offer additional health benefits and may help older adults to maintain physical independence. Beginners should work steadily towards meeting the physical activity levels recommended for all healthy adults. Even small increases in activity will bring some health benefits in the early stages and it is important to set achievable goals that provide success, build confidence, and increase motivation. For example, a beginner might be asked to walk an extra 10 min every other day for several weeks to slowly reach the recommended levels of activity for all healthy adults. It is also critical that beginners find activities they enjoy and gain support in becoming more active from family and friends. Conditioned individuals who have met the physical activity levels recommended for all healthy adults for at least 6 months may obtain additional health benefits by engaging in 300 min or more of moderate-intensity aerobic activity per week, or 150 min or more of vigorous-intensity aerobic activity each week, or equivalent combinations of moderate- and vigorous-intensity aerobic activities. Adults who find it difficult to maintain a normal weight and adults with increased risk of cardiovascular disease or type 2 diabetes may in particular benefit from going beyond the levels of activity recommended for all healthy adults and gradually progressing towards meeting the recommendations for conditioned individuals. Physical activity is beneficial to health with or without weight loss, but adults who find it difficult to maintain a normal weight should probably be encouraged to reduce energy intake and minimize time spent in sedentary behaviours to prevent further weight gain. Children and young people aged 5–16 years should accumulate at least 60 min of moderate-to-vigorous-intensity aerobic activity per day, including vigorous-intensity aerobic activities that improve bone density and muscle strength. 相似文献
58.
Hallal PC Reichert FF Ekelund U Dumith SC Menezes AM Victora CG Wells J 《Journal of sports sciences》2012,30(2):183-190
The aim of this study was to investigate the cross-sectional and prospective associations between physical activity and body composition in adolescence. This is a prospective study, including 4,103 adolescents belonging to the Pelotas (Brazil) 1993 birth cohort, who were followed up at the mean ages of 11.3 and 14.7 years. Subsample analyses included 511 individuals with accelerometry and deuterium dilution data at 13.3 years. Sum of skinfolds at age 11.3 years was highly correlated with skinfolds at age 14.7 years (rho = 0.74, P < 0.001). More than 85% of participants remained in the same quintile or changed by not more than one quintile during the 3.4 year period. Tracking of physical activity was considerably lower, although still significant; the correlation was 0.24 (P < 0.001) and 61.4% of the adolescents moved one or less quintiles. In fully-adjusted models, no significant cross-sectional or longitudinal associations were found between physical activity and body composition, neither in boys nor in girls. These null results were confirmed in the 511 individuals with accelerometry and deuterium data. We provide evidence of tracking of physical activity and particularly body composition during adolescence. Our results do not support the hypothesis that physical activity and fatness are strongly related in adolescents. 相似文献
59.
The aim of this study was to investigate the effects of three different forms of strategy instruction on 210 elementary-school students' reading comprehension. Students were assigned to any one of three intervention conditions or to a traditional instruction condition (control condition). Training students were taught four reading strategies (summarizing, questioning, clarifying, predicting) and practiced these strategies in small groups (reciprocal teaching), pairs, or instructor-guided small groups. At both the post- and follow-up test the intervention students attained higher scores on an experimenter-developed task of reading comprehension and strategy use than the control students who received traditional instruction. Furthermore, students who practiced reciprocal teaching in small groups outperformed students in instructor-guided and traditional instruction groups on a standardized reading comprehension test. 相似文献
60.