Cooperation in Ethnically Diverse Neighborhoods: A Lost‐Letter Experiment

Several studies suggest a negative impact of ethnic diversity on cooperation, but most of them rely on attitudinal and other indirect measurements of cooperation or are derived from the artificial laboratory setting. We conducted a field experiment based on the lost‐letter technique across 52 neighborhoods in Berlin, Germany. The study has two aims. First, we investigate whether the negative effect of ethnic heterogeneity on cooperation holds for concrete cooperative behavior in a real‐world setting. Second, we test the most prominent psychological mechanism that has been proposed to explain the negative effects of heterogeneity on cooperation, namely in‐group favoritism. We do so by experimentally varying the ethnicity and religion of the senders of letters. We find strong support for the negative effect of ethnic diversity on cooperation. We find no evidence, however, of in‐group favoritism. Letters from Turkish or Muslim organizations were as often returned as those from German and Christian organizations, and the ethnic diversity effect was the same for all types of letters.     

缓慢的力量——Ilizarov技术在中国微言

1950年前苏联骨科医师Ilizarov发现了牵张成骨技术,应用模仿自然的缓慢牵伸力能治愈复杂创伤骨折、骨与软组织的缺损、感染和肢体的严重畸形.这种治疗模式既不同于传统骨科手术技术,也不同于现代的创伤骨科的骨折内固定接骨(AO)技术或截骨矫形技术,这些技术的特征之一就是迅速进行骨的固定和矫正畸形.以每天1mm为特征的Ilizarov技术,不仅解决了缺损和畸形中的骨的问题,而且解决了包括血管、神经、肌肉和皮肤在内的其他软组织的生长问题,对骨科一些创伤和畸形的效果无以伦比.由于诸多原因,在我国的传播不够广泛,还需要各方努力,来一起推动该技术的发展和应用.     

导言：外固定与肢体重建——符合生态医学的新学科

29岁的内蒙古青年,15年前车祸伤致小腿肌肉广泛坏死,遗留整个小腿皮包骨头,重度马蹄内翻足,用足背负重行走,去过多个大医院检查都建议膝关节下截肢,在秦泗河的矫形骨科用细钢针穿骨安装骨外固定器（Ilizarov环式外固定器）,术后通过缓慢牵伸,足内翻畸形完全矫正,可以用足底全负重弃拐行走,避免了截肢。在秦泗河矫形外科用这项技术治疗的5000多例患者中,已经挽救了30多例濒临截肢的下肢残缺畸形,使许多无望、悲观的患者重新迈上了新生活。     

缓慢的力量——Ilizarov技术在中国微言

1950年前苏联骨科医师Ilizarov发现了牵张成骨技术,应用模仿自然的缓慢牵伸力能治愈复杂创伤骨折、骨与软组织的缺损、感染和肢体的严重畸形。这种治疗模式既不同于传统骨科手术技术,也不同于现代的创伤骨科的骨折内固定接骨（AO）技术或截骨矫形技术,这些技术的特征之一就是迅速进行骨的固定和矫正畸形。以每天1mm为特征的Ilizarov技术,不仅解决了缺损和畸形中的骨的问题,而且解决了包括血管、神经、肌肉和皮肤在内的其他软组织的生长问题,对骨科一些创伤和畸形的效果无以伦比。由于诸多原因,在我国的传播不够广泛,还需要各方努力,来一起推动该技术的发展和应用。     

议程与习惯性反应对学习时间分配的影响：来自眼动的证据

采用眼动记录技术,操作三种词对位置,探讨议程与习惯性反应对学习时间分配的影响。实验一设置无时间限制条件,结果发现,20名大学生被试均优先选择左边的项目,项目的自定步调学习时间不存在词对位置效应。结果表明,被试的习惯性反应影响项目选择,不影响自定步调学习时间。实验二设置有时间限制条件,结果发现,20名大学生被试均优先选择容易项目并分配更多的时间学习容易项目,且容易项目的选择存在词对位置效应。结果表明,议程驱动主导被试的项目选择和自定步调学习时间,但不能完全消除习惯性反应对项目选择的影响。     

Effects of school-based interventions on motivation towards physical activity in children and adolescents: A systematic review and meta-analysis

IntroductionAssuming that motivation is the key to initiate and sustain beneficial health behaviors, the aim of this systematic review was to analyze the effects of school-based physical activity interventions on a variety of motivational outcomes towards PA in school-aged children and adolescents.MethodsA comprehensive literature search was carried out in six electronic databases to identify randomized controlled trials and quasi-experimental trials examining the effects of PA interventions implemented during the regular school day, e.g., during physical education lessons or lunch breaks. Primary outcomes of interest were students' motivation, basic psychological needs, goal orientation, enjoyment, and motivational teaching climate in physical education. Meta-analyses were conducted for these outcomes using Comprehensive Meta-analysis software. Secondarily, intervention effects on students' PA behaviors were examined and the findings summarized narratively. Methodological quality of studies was evaluated using the Cochrane Collaboration's tool for assessing risk of bias for randomized trials; certainty of evidence on outcome level was evaluated using the GRADE approach.ResultsIn total, 57 studies carried out between 2001 and 2018 were included in this review. Sixteen individual meta-analyses were performed and revealed significant pooled effects for the outcomes enjoyment (g = 0.310), perceived autonomy (g = 0.152), identified regulation (g = 0.378), intrinsic motivation (g = 0.419), self-determination index (g = 0.672), task/mastery climate (g = 0.254), ego/performance climate (g = −0.438), autonomy supportive climate (g = 0.262), task goal orientation (g = 1.370), ego goal orientation (g = −0.188). The narrative data synthesis indicated an increase in students' PA behavior. The overall risk of bias was high across all studies and certainty of evidence of meta-analyzed outcomes ranged from very low to moderate. Moderate certainty of evidence was found for ego/performance climate and ego goal orientation. Conclusions: Meta-analyses suggest that school-based PA interventions may be effective in increasing a variety of motivational outcomes. However, the certainty of evidence was limited in the majority of outcomes. Further research is needed to identify effective intervention strategies that increase students’ motivation towards PA.     

Ethical dilemmas of Turkish counsellors: a critical incidents study

Ethical dilemmas from a national purposive sample of Turkish counsellors (N = 172) were collected using critical incidents technique. Content analysis was performed with open coding guided by the classification of American Counseling Association code of ethics. Incidents regarding confidentiality and privacy (56.4%), with 37.1% involving incidents of reporting child sex abuse, had the highest percentage of prevalence. Dilemmas involving conflicts with school principals ranked second (16.3%), while incidents regarding dual relationships and boundaries (14%) ranked third. Implications for the development of a research-based and culturally sensitive code of counselling ethics in Turkey are discussed, and recommendations for future research are provided.     

Clinical theory at the border(s): Emerging and unintended crossings in the development of clinical theory

The author provides some scaffolding for thinking about emerging and unintended integrative developments in clinical theory. The emergent theory to which the author refers works at a different level of theoretical discourse than explicit attempts at comparative translation of psychoanalytic concepts or theories. In contrast, most of the theory that is explored in this paper involves clinical discourse aimed at solving important common clinical problems. The work of a group of authors (Jay Greenberg, John Steiner, Anton Kris, Michael Feldman and Charles Spezzano) is described as simultaneously embedded within a particular orientation while demonstrating a kind of unwitting reach to a broad swathe of analysts. Distinctions are made between this kind of linking of clinical theory versus self‐consciously syncretic and integrative approaches to theory development. The author also discusses the educational implications of this emergent theory for teaching and learning during psychoanalytic training.     

The effect of product type on value linkages in the means‐end chain: implications for theory and method

Means‐end chain (MEC) theory proposes that consumer motivation can only be understood in terms of the hierarchical linkages between attributes, consequences and values. Other researchers have suggested a much more immediate impact of values on motivation. Seeking to explain these conflicting views, this research suggests and empirically tests the proposition that the role of values in consumer motivation differs by product type and also tests that the linkages are not affected by individual differences in the need for cognition. A sample of 191 consumers indicated their motivation to consume utilitarian and non‐utilitarian products using an adapted association pattern matrix technique. Responses were analysed using mixed‐design ANOVAs with planned comparisons. Results indicate significant differences related to product type in the role of values in consumer motivation. Limitations, implications for MEC theory and future research are discussed. Copyright © 2004 Henry Stewart Publications Ltd.     

Transverse shear surface wave in a functionally graded material infinite half space

The variable substitution and power-series techniques are used for the asymptotic analytical derivation of the governing equation of a transverse surface wave. The results reveal that the transverse wave can propagate along the surface of a functionally graded infinite half space in various modes, and that their dispersion relations are normal. For certain cases, energy is concentrated on the surface region to a depth of several wavelengths. A new theoretical foundation based on the transverse surface wave can be provided for graded-material characterization by experimental measurement. Some phenomena of seismic wave propagation may also be explained.