Motivation counteracts fatigue-induced performance decrements in soccer passing performance     

Jeroen C.M. Barte  Arne Nieuwenhuys  Sabine A.E. Geurts  Michiel A.J. Kompier 《Journal of sports sciences》2019,37(10):1189-1196

Recent theories suggest that negative effects of fatigue on performance are determined by perception of effort and motivation rather than being directly caused by reaching physiological limits. In the current experiment, the influence of motivation on fatigue-induced decrements in soccer performance was experimentally investigated. Sixty amateur soccer players performed a validated soccer-passing test before and after a fatigue protocol. Results showed that players’ motivation and performance decreased after the fatigue protocol for players in the control group. In contrast, players in the motivation group (i.e., with motivation experimentally induced after the fatigue protocol) were able to uphold their motivation and increase their performance. These results indicate that motivation plays a crucial role in performance under fatigue, as fatigue-induced decrements in soccer passing performance can be counteracted by high levels of motivation. Future research may explore the limits of this counteracting effect and extend findings to other relevant performance aspects.  相似文献   

Assessing Determinants of Perceived Ease of Use of Institutional Repositories by Lecturers in Nigerian Universities     

Alice A. Bamigbola  Airen E. Adetimirin 《International Information and Library Review》2020,52(2):95-107

Abstract

Institutional repositories (IRs) present platform to disseminate research findings to complement the traditional scholarly communication model. The use of IRs is beneficial to authors, host institutions, libraries and society at large. Despite the numerous benefits of IRs, there is low deposit of scholarly works by lecturers and the investment on IRs seems to be a waste. This study examined determinants of perceived ease of use (PEOU) of IRs by lecturers in Nigerian universities. A survey of lecturers received 857 respondents. Awareness, anchor and adjustment factors were found to be determinants of PEOU of Institutional repositories by lecturers in Nigerian Universities.  相似文献   

Application of velocity loss thresholds during free-weight resistance training: Responses and reproducibility of perceptual,metabolic, and neuromuscular outcomes     

Jonathon Weakley  Shaun McLaren  Carlos Ramirez-Lopez  Amador García-Ramos  Nick Dalton-Barron  Harry Banyard 《Journal of sports sciences》2020,38(5):477-485

ABSTRACT

The aim of this study was to investigate the differences and long-term reliability in perceptual, metabolic, and neuromuscular responses to velocity loss resistance training protocols. Using a repeated, counterbalanced, crossover design, twelve team-sport athletes completed 5-sets of barbell back-squats at a load corresponding to a mean concentric velocity of ~0.70 m·s^?1. On different days, repetitions were performed until a 10%, 20% or 30% velocity loss was attained, with outcome measures collected after each set. Sessions were repeated after four-weeks. There were substantial between-protocol differences in post-set differential ratings of perceived exertion (dRPE, i.e., breathlessness and leg muscles, AU) and blood lactate concentration (B[La], mmol·L^?1), such that 30%>20%>10% by small to large magnitudes. Differences in post-set countermovement jump (CMJ) variables were small for most variables, such that 30%<20%<10%. Standard deviations representing four-week variability of post-set responses to each protocol were: dRPE, 8–11; B[La], 0.8–1.0; CMJ height, 1.6–2.0; CMJ PPO, 1.0–1.8; CMJ PCV, 0.04–0.06; CMJ 100ms-Impulse, 5.7–11.9. Velocity loss thresholds control the magnitude of perceptual, metabolic, and neuromuscular responses to resistance training. For practitioners wanting to reliably prescribe training that can induce a given perceptual, metabolic, or neuromuscular response, it is strongly advised that velocity-based thresholds are implemented.  相似文献   

员工多样性、知识共享与个体创新绩效——一个有调节的中介模型     

刘灿辉  安立仁 《科学学与科学技术管理》2016,(7):170-180

关于员工多样性与绩效的关系,已有的研究并无定论。将研究层次限定在个体层面,以信息决策理论、社会分类理论、断层线理论等为基础,选取个体感知差异来刻画组织的多样性情况,深入研究其对个体创新绩效的具体作用机理。面向全国多家企事业单位展开调研,回收有效问卷306份,对数据进行分层回归分析的结果表明:员工多样性与个体创新绩效正相关;知识共享部分中介了这一正向关系;员工对待多样性的态度对此中介过程发挥调节作用。随着个体对多样性的态度越来越积极、正面,多样性对知识共享的促进作用越来越显著。  相似文献   

C2C网上交易中感知风险与第三方支付担保服务使用     

邵兵家  吴传淑  许博 《软科学》2007,21(5):45-48

通过理论分析确定了感知风险及第三方支付担保服务采用的影响因素,通过自行设计开发的基于Web具有决策支持功能的C2C模拟实验系统来收集数据并对此进行了验证。研究结果表明卖方信誉、待售商品价格以及买方风险态度等因素对感知风险有积极影响,感知风险会影响网络交易者对第三方支付担保服务的使用意向。  相似文献   

组织支持认知与领导—成员交换对员工回报的影响实证研究   总被引：3，自引：0，他引：3  

吴继红 《软科学》2006,20(5):63-66

根据组织支持认知(Perce ived O rgan izational Support)和领导—成员交换(LeaderM ember Exchange)的研究,员工既与组织也与主管建立了社会交换关系。在借鉴国内外的相关理论的基础上,通过100对主管和员工的问卷调查验证了企业员工的组织支持认知对他们的任务绩效、组织公民行为和组织承诺有正向的影响;而企业员工的领导—成员交换认知对他们的组织公民行为有正向的影响。  相似文献   

战略联盟不稳定性的研究现状与展望   总被引：9，自引：0，他引：9  

吴海滨  李垣  谢恩 《科研管理》2004,25(5):46-51

竞争环境的变化使得战略联盟成为企业间合作的一种重要形式，但高达40％—60％的失败率一直是困扰联盟管理的一项难题。本文总结了战略联盟高不稳定性的理论解释和影响因素，并结合学习型联盟与合资企业两种重要的联盟方式探讨了特定联盟形式的不稳定性的特点以及促进联盟稳定的机制设置，在此基础上总结了目前研究的不足和今后研究的方向。  相似文献   

创业失败经历影响新创企业创业导向的实证研究     

徐幸子  陈聪  李纪珍  高建 《研究与发展管理》2019,31(4):51-63

本文关注创业者的创业失败经历对新创企业创业导向的超前行动性、创新性以及风险承担性3个维度的影响，并探究感知创业环境的调节作用。利用中国跨省份1 133家新创企业的一手调研数据进行实证分析，结果显示：创业失败经历对超前行动性、创新性和风险承担性3个维度具有显著的正向影响，即创业失败经历越多，创业者的超前行动性、创新性和风险承担性越强；感知创业环境作为调节变量，加强了创业失败经历对创新性的正向影响，削弱了创业失败经历对风险承担性的正向影响。  相似文献   

Benefits of personality characteristics and self‐efficacy in the perceived academic achievement of medical students     

Sabine Guntern  Hanke Korpershoek  Greetje van der Werf 《教育心理学》2017,37(6):733-744

This study investigates the joint impact of personality characteristics and self‐efficacy on the perceived academic achievement of medical students on top of their prior high school performance. The sample consisted of medical students in their pre‐clinical years. The students’ grade point average scores at high school were included as control variable in our explanatory models. Based on previous findings in the literature, we selected self‐discipline, social activity and emotional stability from the Five Factor Model of Personality as predictor variables. Furthermore, following the social cognitive theory of Bandura, we added self‐efficacy (students’ belief in their academic skills) as an additional predictor. The logistic regression analyses confirmed the importance of self‐discipline (positively related) and social activity (negatively related) for these students’ perceived academic achievement. Additionally, we found a positive contribution of self‐efficacy. The results of this study (as discussed in the final sections) have implications for support programmes in the practical field.  相似文献   

Computer-based course evaluation: an extended technology acceptance model     

W. M. To  Margaret N. F. Tang 《Educational studies》2019,45(2):131-144

This study explored the antecedents of students’ intention to participate in computer-based course evaluation. The study proposed an extended Technology Acceptance Model (TAM) that integrated subjective norm and perceived relevance into TAM. Based on the responses from 149 business school students in Macao, the study identified the direct and indirect effects of subjective norm and perceived relevance on perceived ease of use, perceived usefulness and students’ intention to participate in computer-based course evaluation. The results of structural equation modelling showed that subjective norm had a positive, strong and significant effect on perceived relevance that in turn affected perceived ease of use and perceived usefulness. Besides, subjective norm and perceived usefulness had direct effects on students’ intention to participate in computer-based course evaluation. Thus, subjective norm played a major role in affecting Chinese students’ participation in course evaluation.  相似文献