Multi-segmental thoracic spine kinematics measured dynamically in the young and elderly during flexion

In contrast to the cervical and lumbar region, the normal kinematics of the thoracic spine have not been thoroughly investigated. The aim of this study was to characterize normal multi-segmental continuous motion of the whole thoracolumbar spine, during a flexion maneuver, in young and elderly subjects. Forty-two healthy volunteers were analyzed: 21 young (age = 27.00 ± 3.96) and 21 elderly (age = 70.1 ± 3.85). Spinal motion was recorded with a motion-capture system and analyzed using a 3rd order polynomial function to approximate spinal curvature throughout the motion sequence. The average motion profiles of the two age groups were characterized. Flexion timing of the thoracic region of the spine, as compared to the lumbar spine and hips, was found to be different in the two age groups (p = 0.011): a delayed/sequential motion type was observed in most of the young, whereas mostly a simultaneous motion pattern was observed in the elderly subjects. A similar trend was observed in flexion of the lower thoracic segments (p = 0.017). Differences between age groups were also found for regional and segmental displacements and velocities. The reported characterization of the thoracic spine kinematics may in the future support identification of abnormal movement or be used to improve biomechanical models of the spine.     

Reflection for learning in doctoral training: writing groups,academic writing proficiency and reflective practice

This literature review highlights the benefits of participating in a doctoral writing group, with specific emphasis on how these learning communities foster reflective practice skills development. In particular, this review proposes that the process of continuous peer feedback and discussion benefits students by helping them verbalise their internal reflective thinking, fostering reflective practice skills development through various authentic learning experiences. Consequently, this review highlights the importance of establishing and supporting doctoral writing groups to further develop doctoral students’ personal epistemology, growth and professional practice.     

应激心向对女性急性应激条件下工作记忆的影响

为了探讨急性应激对工作记忆的影响,本研究引入应激心向的概念。实验1验证了社会性评价冷压测试的可靠性以及应激对工作记忆的影响,并探讨了急性应激条件下一般性应激心向与工作记忆的关系,结果发现,在急性应激条件下,女性的一般性应激心向不影响工作记忆的表现。实验2通过视频诱发被试的情境性应激心向,发现应激有利心向组比应激有害心向组在工作记忆任务中的表现更好,且应激心向得分与任务的准确率成正相关。研究表明女性在应激条件下的工作记忆表现会受具体应激心向的影响。     

Emotional responses to world inequality

Drawing on discussions with Kenyan, Mexican and British teachers, this paper reports on emotional responses to international socio-economic inequality. Emotional regimes are explored to identify what ‘appropriate’ responses to inequality are in a variety of local and national contexts. These include rural and urban settings, and social milieus ranging from elite to deprived. Politeness, hand-wringing and humour can create a protective distance; while sadness, anger and hope for change connect with the issue of inequality and challenge the associated injustices. Distancing and connecting emerge as central themes in the analysis. The spatial patterns of emotions align with participants' socio-economic positions, in more disadvantaged settings unapologetic anger about inequality was expressed, as was humour in the face of group or national misfortune. These emotional regimes can be understood within the wider context of participants' socio-economic position; their senses of injustice; and their views on the possibility of social change. I argue that social norms surrounding justice and distribution can influence levels of inequality, and vice versa. This is of particular importance given the societal damage caused by inequality, which is now widely acknowledged.     

不同强度短时有氧运动对执行功能的影响

探讨短时有氧运动对执行功能的影响是否与运动强度和性别有关, 为从运动强度和性别角度选择合理的有氧运动干预方案改善执行功能提供基础。研究采用混合设计, 选取30名大学生(男女人数各半), 使用功率自行车实施30分钟的不同强度有氧运动, 使用Flanker任务、2-back任务和数字More-odd shifting任务分别测查被试基线、小强度短时有氧运动、中强度短时有氧运动和大强度短时有氧运动后执行功能的抑制、刷新和转换三个子功能的变化, 结果表明：不同强度的短时有氧运动对执行功能产生选择性的积极影响, 且不随性别变化而改变。     

Students with Exceptionalities and the Peer Group Context of Bullying and Victimization in Late Elementary School

We examined bullying and victimization in 5th grade classrooms in relation to students’ education status and peer group membership. The sample consisted of 484 participants (258 girls, 226 boys), including 369 general education students, 74 academically gifted students, and 41 students with mild disabilities. Students with mild disabilities were more likely to be perceived as being bullies by both teachers and peers. Teachers also rated students with mild disabilities significantly higher for being bullied by peers. Academically gifted students were rated by teachers as the lowest for both bullying and being bullied. Associating with aggressive or perceived-popular peers increased the likelihood of being perceived as a bully. Social isolates were more likely to be bullied than students who did not associate with perceived-popular peers who, in turn, were more likely to be bullied than students who associated with perceived-popular peers. Students with mild disabilities who had aggressive and perceived-popular associates had more peer nominations for bullying than all others. In contrast, students in general education with neither aggressive nor perceived-popular associates had the fewest peer nominations for bullying. We discuss implications for research and intervention.     

Public decisions or private decisions? When the specific case guides public decisions

Educators' differential decisions towards identified single students as compared with unidentified students, or a group of identified students, were examined by presenting educators with educational scenarios describing actual dilemmas from the three different perspectives. The first two studies indicate that willingness to change the existing policy and to [bend the rule] is greater when a dilemma is presented from the specific identified student's perspective than when presented as a general dilemma. The results of the third study suggest that in their decisions regarding an identified individual student, educators allow more changes in school regulations and give less weight to the school needs as compared with their decisions regarding an unidentified student or a group of students. Implications for policy making are discussed. Copyright © 2008 John Wiley & Sons, Ltd.     

The relationship between relational models and individualism and collectivism: evidence from culturally diverse work groups

Relational models theory (Fiske, 1991 ) proposes that all thinking about social relationships is based on four elementary mental models: communal sharing, authority ranking, equality matching, and market pricing. Triandis and his colleagues (e.g., Triandis, Kurowski, & Gelfand, 1994 ) have suggested a relationship between the constructs of horizontal and vertical individualism and collectivism and Fiske's relational models. However, no previous research has examined this proposed relationship empirically. The objective of the current study was to test the association between the two frameworks in order to further our understanding of why members of culturally diverse groups may prefer different relational models in interactions with other group members. Findings from this study support a relationship between Triandis' constructs and Fiske's four relational models and uphold Fiske's ( 1991 ) claim that the use of the relational models is culturally dependent. As hypothesized, horizontal collectivism was associated with a preference for equality matching and communal sharing, vertical individualism was related to a preference for authority ranking, and vertical collectivism was related to a preference for authority ranking and communal sharing. However, contrary to expectations, horizontal individualism was not related to a preference for equality matching and market pricing, and vertical individualism was not associated with market pricing. By showing that there is a relationship between Triandis' and Fiske's frameworks, this study closes a gap in relational models theory, namely how culture relates to people's preferences for relational models. Thus, the findings from this study will enable future researchers to explain and predict what relational models are likely to be used in a certain cultural context.     

Collective motivation beliefs of early adolescents working in small groups

This study examined collective efficacy, group cohesion, and group performance in 125 randomly assigned groups of older (mean age 13.45 years) and younger (mean age 11.41 years) early adolescents working on three cooperative tasks. Collective motivation significantly predicted performance, even after controlling for past performance and self-efficacy for the older but not the younger participants. For the older (but not the younger) participants, groups with high collective efficacy and group cohesion scored higher on performance tasks than groups with low collective efficacy and group cohesion. The results point to the emergence of collective motivation beliefs in early adolescence, consistent with theories of social and cognitive development. Implications for theory and suggestions for future research are discussed.     

Psychometric examination and normative data for the narcissistic personality inventory 29 item version

The Narcissistic Personality Inventory (NPI) is commonly used in empirical studies of narcissism. Few population-based studies have been published. Our aim was to do a confirmatory factor analysis (CFA) of the NPI 29 item version with a four-factor structure, in two population-based samples and in a patient sample, and present normative population-based data. The NPI-29 was filled in by 324 respondents from the Norwegian population, 231 from the Swedish population and 167 Norwegian psychiatric patients. The four-factor structure of the NPI-29 with Leadership/Power, Exhibitionism/Self-admiration, Superiority/Arrogance and Uniqueness/Entitlement was reproduced in these samples. The CFA models showed good fit indices in all samples. Mean scores on the NPI-29 and four subscales hardly differed between the samples. For the NPI-29 total score and factors, few significant differences were observed. CFA of the samples supported the factor structure of the NPI-29 formerly identified by principal component analysis of the Swedish population sample.