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排序方式: 共有204条查询结果,搜索用时 31 毫秒
1.
Beatriz Lucas‐Molina Ariel A. Williamson Rosa Pulido Alicia Prez‐Albniz 《Psychology in the schools》2015,52(3):298-315
Peer harassment is a major social problem affecting children and adolescents internationally. Much research has focused on student‐to‐student harassment from either an individual or a multilevel perspective. There is a paucity of multilevel research on students’ relationships with the classroom teacher. The purpose of this study was to use a socioecological perspective to examine the relationships between individual student‐level characteristics, problematic teacher–student relationships, and student‐reported peer harassment. A total of 1,864 children (50.7% female) aged 8 to 13 years (M = 9.82, SD = 1.24), nested in 27 schools (58.2% public) in Spain, participated in the study. Ninety‐four homeroom teachers reported on teacher–student relationships, and students completed self‐report measures related to peer harassment and teacher–student relationships. Multilevel models showed that relationships between students and teachers exerted a varying degree of influence on classroom levels of peer harassment. Specifically, student‐reported teacher support was associated with diminished student‐reported peer victimization, whereas direct and indirect student‐reported teacher‐to‐student aggression was associated with increased peer victimization. Additionally, student‐reported student‐to‐teacher aggression and teacher‐to‐student aggression were associated with increased student‐reported peer aggression. Teacher‐reported variables at the classroom level, however, contributed little to student‐reported outcomes. Results are discussed in the context of future research on relationships between teachers and students. 相似文献
2.
Paulo Ricardo Pereira Dos Santos Bruno Remígio Cavalcante Andreya Karolyne Dos Santos Vieira Marcos Duarte Guimarães Antônio Marconi Leandro Da Silva Anderson Da Costa Armstrong 《Journal of sports sciences》2020,38(17):1936-1942
ABSTRACT We performed a randomized, controlled trial to analyse the effects of resistance training (RT) on cognitive and physical function among older adults. Fifty participants (mean age 67 years, ~60% woman) were randomly assigned to an RT program or a control group. Participants allocated to RT performed three sets of 10-15RM in nine exercises, three times per week, for 12-weeks. Control group did not perform any exercise. Variables included cognitive (global and executive function) and physical function (gait, mobility and strength) outcomes. At completion of the intervention, RT was shown to have significantly mitigated the drop in selective attention and conflict resolution performance (Stroop test: -494.6; 95%CI: -883.1; ?106.1) and promoted a significant improvement in working memory (digit span forward: -0.6; 95%CI: ?1.0; ?0.1 and forward minus backward: -0.9; 95% CI: ?1.6; ?0.2) and verbal fluency (animal naming: +1.4, 95%CI 0.3, 2.5). No significant between-group differences were observed for other cognitive outcomes. Regarding physical function, at completion of the intervention, the RT group demonstrated improved fast-pace gait performance (?0.3; 95% CI: ?0.6; ?0.0) and 1-RM (+21.4 kg; 95%CI: 16.6; 26.2). No significant between-group differences were observed for other mobility-related outcomes. In conclusion, RT improves cognitive and physical function of older adults. 相似文献
3.
Chris Bishop Lucas A. Pereira Valter P. Reis Paul Read Anthony N. Turner Irineu Loturco 《Journal of sports sciences》2020,38(11-12):1296-1303
ABSTRACT The aims of the present study were to provide an in-depth comparison of inter-limb asymmetry and determine how consistently asymmetry favours the same limb during different vertical jump tests. Eighteen elite female under-17 soccer players conducted unilateral squat jumps (SJ), countermovement jumps (CMJ) and drop jumps (DJ) on a portable force platform, with jump height, peak force, concentric impulse and peak power as common metrics across tests. For the magnitude of asymmetry, concentric impulse was significantly greater during the SJ test compared to CMJ (p = 0.019) and DJ (p = 0.003). No other significant differences in magnitude were present. For the direction of asymmetry, Kappa coefficients revealed fair to substantial levels of agreement between the SJ and CMJ (Kappa = 0.35 to 0.61) tests, but only slight to fair levels of agreement between the SJ and DJ (Kappa = ?0.26 to 0.18) and CMJ and DJ (Kappa = ?0.13 to 0.26) tests. These results highlight that the mean asymmetry value may be a poor indicator of true variability of between-limb differences in healthy athletes. The direction of asymmetry may provide a useful monitoring tool for practitioners in healthy athletes, when no obvious between-limb deficit exists. 相似文献
4.
da Silva Cláudia Sampaio Corrêa Teixeira Marco Antônio Pereira Cardoso Paulo Fernández-Navarro Pablo Gonçalves Miguel M. Duarte Maria Eduarda 《International Journal for Educational and Vocational Guidance》2020,20(3):635-652
International Journal for Educational and Vocational Guidance - This case study of an undecided university student has two aims: to assess the effect of life design career counselling on... 相似文献
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6.
Winston Costa Pereira Muddanna S. Rao D. M. Vasudevan 《Indian journal of clinical biochemistry : IJCB》2003,18(2):161-168
Immunization with a proper dose of an antigenic stimulus leads to cell proliferation and antibody response of circulating
lymphocytes. We have previously observed that Secondary immunized spleenocytes resist ceramide-mediated apoptosisin vitro. Our present study is aimed at investigating thein vivo effect of immunization on apoptosis. Mice were subjected to either Primary or Secondary dose with Tetanus Toxoid. Unimmunized
spleenocytes served as controls. Unimmunized, Primary and Secondary immunized mice were later exposed to chemotherapeutic
drugs such as Etoposide/Methotrexate/Vincristine to induce apoptosis. Apoptosis was studied by using the Feulgen reaction
on 5μ thin parafin sections of spleen. It was observed that Secondary immunized mice showed a lower percentage of apoptosis
as compared to Primary or Unimmunized mice that was subjected to either of the chemotherapeutic drugs. It was thus concluded
that Secondary immunization inhibits the process of chemotherapeutic drug induced apoptosis in vivo. 相似文献
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8.
Developmental Brain Research With Participants From Underprivileged Communities: Strategies for Recruitment,Participation, and Retention 下载免费PDF全文
Assal Habibi Alissa Der Sarkissian Martha Gomez Beatriz Ilari 《Mind, Brain, and Education》2015,9(3):179-186
Challenges associated with recruitment and retention of participants from underprivileged social communities, in addition to neuroscience researchers' unfamiliarity with these communities, possibly explain the limited number of individuals from these communities who participate in neuroscience research studies. The consequence is a scarcity of data in this fast‐growing segment of the population. In particular, developmental research involving children from ethnic minorities has yet to catch up with the number of studies available for middle‐class White children (Flores et al., 2002). This underrepresentation can lead to disparities in health and social services for children from these communities, as well as to a nonrepresentative knowledge base of child neurodevelopment. Developing and utilizing innovative and culturally sensitive approaches to recruiting participants from underprivileged communities can maximize their participation in research, as behavioral researchers have known for some time. Here, based on our experience recruiting low‐socioeconomic status (SES) Latino children from Los Angeles, we offer strategies to improve recruitment, involvement, and retention. We have a special focus on techniques relevant to recruiting for neuroimaging, which is associated with new challenges not faced to the same degree in research historically. Better inclusion of underrepresented children in research can ultimately lead to the development and improvement of effective public polices to support their needs, ranging from education to health care. 相似文献
9.
Suzana Matheus Pereira Caroline Ruschel Marcel Hubert Leandro Machado Helio Roesler Ricardo Jorge Fernandes 《Journal of sports sciences》2015,33(19):2006-2015
This study aimed to analyse the kinematic, kinetic and electromyographic characteristics of four front crawl flip turn technique variants. The variants distinguished from each other by differences in body position (i.e. dorsal, lateral, ventral) during rolling, wall support, pushing and gliding phases. Seventeen highly trained swimmers (17.9 ± 3.2 years old) participated in interventional sessions and performed three trials of each variant, being monitored with a 3-D video system, a force platform and an electromyography (EMG) system. Studied variables: rolling time and distance, wall support time, push-off time, peak force and horizontal impulse at wall support and push-off, centre of mass horizontal velocity at the end of the push-off, gliding time, centre of mass depth, distance, average and final velocity during gliding, total turn time and electrical activity of Gastrocnemius Medialis, Tibialis Anterior, Biceps Femoris and Vastus Lateralis muscles. Depending on the variant, total turn time ranged from 2.37 ± 0.32 to 2.43 ± 0.33 s, push-off force from 1.86 ± 0.33 to 1.92 ± 0.26 BW and centre of mass velocity during gliding from 1.78 ± 0.21 to 1.94 ± 0.22 m · s?1. The variants were not distinguishable in terms of kinematical, kinetic and EMG parameters during the rolling, wall support, pushing and gliding phases. 相似文献
10.
Pereira Brenda Braga Silva Luciano Fernandes dos Santos Janaina Roberta 《Science & Education》2022,31(1):1-20
Science & Education - The purpose of this study is to identify and analyze meanings that the term complexity assumes in Brazilian theses and dissertations in the field of environmental... 相似文献