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ObjectiveTo study the influence of prolonged wearing of unstable shoes on standing postural control in prolonged standing workers.MethodsThe participants were divided into two groups: one wore unstable shoes while the other wore conventional shoes for 8 weeks. Stabilometry parameters related to centre of pressure (CoP), rambling (RM) and trembling (TR) as well as the total agonist/antagonist muscle activity, antagonist co-activation and reciprocal activation were evaluated during upright standing, before and after the 8 weeks period. In both moments, the subjects were evaluated wearing the unstable shoes and in barefoot.ResultsThe unstable shoe condition presented increased CoP displacement related variables and decreased co-activation command compared to barefoot before and after the intervention. The prolonged wearing of unstable shoes led to: (1) reduction of medial–lateral CoP root mean square and area; (2) decreased anteroposterior RM displacement; (3) increased anteroposterior RM mean velocity and mediolateral RM displacement; (4) decreased anteroposterior TR RMS; and (5) increased thigh antagonist co-activation in the unstable shoe condition.ConclusionThe unstable shoe condition is associated to a higher destabilising effect that leads to a selection of more efficient and accurate postural commands compared to barefoot. Prolonged wearing of unstable shoes provides increased effectiveness and performance of the postural control system, while wearing of unstable shoes in upright standing, that are reflected by changes in CoP related variables and by a reorganisation of postural control commands. 相似文献
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绩效考核满意度对员工工作行为的影响和作用机制一直是组织行为领域研究的重点。本研究采用《绩效考核满意度量表》、《在职行为量表》等研究工具,抽取419名在职员工,考察绩效考核满意度与工作退缩行为之间的关系以及组织公平感、道德型领导在其二者关系上的作用机制。结果发现:(1)绩效考核满意度与工作退缩行为之间存在显著负相关。(2)道德型领导调节绩效考核满意度和组织公平感之间的关系。(3)道德型领导调节绩效考核满意度和工作退缩行为之间的关系。(4)道德型领导和绩效考核满意度的交互作用通过分配公平、程序公平影响工作退缩行为。 相似文献
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Carolien Rieffe Evelien Broekhof Maartje Kouwenberg Judith Faber Makoto M. Tsutsui Berna Güroğlu 《European Journal of Developmental Psychology》2016,13(4):439-451
The distinction between proactive and reactive functions of aggression is one of the most common divisions when investigating aggression among children and adolescents. To date, self-report is the least used measurement, despite existing literature supporting the view that the best informant regarding internal processes and motives are children themselves. The main aim of this study was to examine the construct and concurrent validity of a new self-report questionnaire, which aims to disentangle acts of reactive vs. proactive aggression that are most common within the daily lives of children. We examined the self-report measure among 578 children (313 girls, 265 boys, mean age 11 years, range 9–13 years). Most children (90% boys; 85% girls) reported at least one act of aggression over the last four weeks. Furthermore, the outcomes support the two-factor structure (reactive and proactive aggression) and the questionnaire showed good concurrent and discriminant validity with measures for emotional and social functioning. This study validates the use of the self-report instrument for reactive and proactive aggression and demonstrates that children can successfully distinguish between their own motives for reactive and proactive forms of aggressive behaviours. 相似文献
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The present study was conducted to determine the effects of self-monitoring and a changing criterion with public posting phase on student on-task behavior and written language performance. Four elementary school boys participated and were enrolled in an urban-based, elementary-level resource room for students with learning disabilities. Self-monitoring procedures for on-task behavior included the students listening to a tone recorded at 60-s intervals and responding to the question, “Am I on-task?” Written language performance involved the students writing for a 10-min. session and counting and graphing the number of words written. During baseline conditions, student on-task behavior and written language performance were collected. During the self-monitoring conditions, the students monitored their on-task behavior and written language performance simultaneously. In the changing criterion with public posting condition, the students received their goal for the day's session prior to writing, wrote, and recorded whether they met their goal. While the results show a functional relationship between self-monitoring and on-task behavior, the data for the relationship between self-monitoring and written language performance were less compelling. A greater increase occurred when the changing criterion with public posting condition was introduced. Results suggest that self-monitoring changed on-task behavior; however, further research needs to be conducted to determine the conditions that would produce comparable effects for written language performance. Several implications for students and teachers and parent training were discussed. 相似文献
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不同背景下不同频率闪烁的突显工效研究 总被引:4,自引:0,他引:4
本实验对黑、白背景下高频、中频、低频三种闪烁的突显工效进行了比较研究。实验结果表明:闪烁作为突显类型可以提高视觉搜索的绩效,而且,在闪烁的频率较高时(27Hz以上),这种闪烁的突显工效更为明显。视觉材料的呈现背景对闪烁突显视觉搜索绩效没有明显的影响,但在白背景下采用闪烁效果较好。 相似文献
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绩效薪酬对雇员创造力的影响:人-工作匹配和创造力自我效能的作用 总被引:1,自引:0,他引:1
采用296对上下级匹配数据考察了绩效薪酬对创造力的影响以及人-工作匹配的调节效应和创造力自我效能的中介效应。研究结果表明:绩效薪酬对创造力有倒U形影响;创造力自我效能部分中介了绩效薪酬对创造力的倒U形影响;人-工作匹配调节绩效薪酬与创造力的关系,人-工作匹配度越高,中等强度绩效薪酬的正面效应越强,高强度绩效薪酬的负面效应越弱;绩效薪酬与人-工作匹配的交互效应通过创造力自我效能的完全中介效应影响创造力。 相似文献
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以315名大学生为研究对象,采用t检验、相关分析、方差分析和回归分析技术探讨了不同成绩水平、不同性别、不同专业学生的外语焦虑、自我效能感和外语成绩的差异及三者之间的关系。结果表明:(1)外语成绩及格组学生的外语焦虑水平显著低于不及格组学生,自我效能感显著高于不及格组学生;女大学生的外语成绩、自我效能感及能力因子和挫折因子上的自我效能感显著高于男大学生,男女大学生的外语焦虑水平无显著性差异;文科大学生的外语焦虑水平和外语成绩显著高于理科大学生,文、理科学生的自我效能感无显著性差异;(2)外语焦虑与外语成绩呈显著负相关,与自我效能感呈显著负相关,自我效能感与外语成绩呈显著正相关,性别、专业、外语焦虑、自我效能感、效能感的能力和挫折两个因子是外语成绩的显著预测变量。 相似文献