Power in Bayesian Mediation Analysis for Small Sample Research

Bayesian methods have the potential for increasing power in mediation analysis (Koopman, Howe, Hollenbeck, & Sin, 2015; Yuan & MacKinnon, 2009). This article compares the power of Bayesian credibility intervals for the mediated effect to the power of normal theory, distribution of the product, percentile, and bias-corrected bootstrap confidence intervals at N ≤ 200. Bayesian methods with diffuse priors have power comparable to the distribution of the product and bootstrap methods, and Bayesian methods with informative priors had the most power. Varying degrees of precision of prior distributions were also examined. Increased precision led to greater power only when N ≥ 100 and the effects were small, N < 60 and the effects were large, and N < 200 and the effects were medium. An empirical example from psychology illustrated a Bayesian analysis of the single mediator model from prior selection to interpreting results.     

The effects of self-efficacy,hope, and engagement on the academic achievement of secondary education in the Dominican Republic

Achievement in the academic settings has long lasting positive outcomes. In this study, hope, self-efficacy, and engagement are linked to academic success. The aims of this study were to test a model which predicts academic success in the Dominican Republic while testing for the mediator role of engagement. The sample was composed of 614 middle-school students. Scales of Dispositional Hope, Academic Self-Efficacy, Academic Self-concept, and Engagement were used. Academic performance was measured with students' grades in Spanish and Mathematics. Three structural equation models were tested. The retained model stated hope and self-efficacy as antecedents, engagement dimensions as mediators and grades and academic self-concept as final outcomes. There were significant effects of hope and self-efficacy on engagement, and behavioral engagement was the best predictor of academic success. These results point out that interventions should target variables, such as hope or engagement to increase academic success.     

核心企业视角的产业集群与企业技术 创新关系的重新研究

摘要：产业集群有助于群内企业创新一直是集群文献中体现集群竞争优势的一个重要理论,本文从核心企业的视角出发对此进行了重新研究。发现核心企业阶段,现有文献中所强调的集群因素对核心企业创新虽然仍具有正向影响,但其影响已经相对较弱,且其作用机制也发生了变化。从原有的直接作用方式转化为间接的作用方式,本质上需要通过核心企业规模成长的中介作用才能对核心企业创新产生影响。这实际上意味着随着核心企业成长,群内企业的分工与定位更为明晰,并使得集群对企业创新的支持作用方式也发生了相应地改变,核心企业越来越担负起整个集群创新的发动机作用,创新主体也从集群整体层面重新又回到了企业个体层面尤其是核心企业这类特殊的企业上。这显示在一定程度上,强调整体层面的“集群式创新”理论恐怕已经很难再具有其原有的意义。     

The Translator in Cultural Mediation

With the increasing cross-cultural exchanges,the translator should respect and spread the source culture.It is necessary for translators to employ as much as possible the foreignizing translation to keep the exotic flavor of the source language.A Chinese translator’s responsibility is to spread Chinese culture.     

A PREDICTABLE MULTI-THREADED MAIN-MEMORY STORAGE MANAGER

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试论英汉影视翻译方法之争——《傲慢与偏见》汉译配音赏析有感

影视翻译是一种特殊的翻译形式，同样涉及翻译方法的艰难取舍。本文试图就《傲慢与偏见》汉译配音几个经典片段的赏析．展示英汉影视翻译中一些翻译方法．即直译与意译、归化与异化、语义翻译与交际翻译的取舍矛盾，就译者作为文化使者是如何及可以如何解决这些矛盾的呈管窥之见．     

同群效应促进企业绿色创新吗？——基于绩效期望差距的中介效应检验

鉴于已有相关研究中缺乏基于同群效应作用的“认知—比较—行动”管理逻辑视角,基于2009—2019年我国沪深A股上市公司数据,从绩效期望差距的中介效应视角切入,构建“同群企业绿色创新行为—绩效期望差距—焦点企业绿色创新行为”理论模型,分析同群效应对企业绿色创新行为的作用机理。结果发现：同群效应对企业绿色创新行为具有促进作用;绩效期望顺差和绩效期望逆差都在同群效应与企业绿色创新行为的关系中发挥部分中介作用,即绩效期望逆差（或顺差）越大,实际绩效低于（或高于）行业期望绩效越多,越有可能开展（或中止）绿色创新;市场不确定性与环境规制均正向调节同群效应对企业绿色创新行为关系。     

中介理论视角下的幼儿园语言教育

幼儿园语言教育是学前教育的重要内容,对于学前儿童的语言发展具有重要意义。在中介理论的视角下考察幼儿园的语言教育,可以从教育过程中的师幼以及幼幼互动、幼儿园语言教育途径和幼儿园语言教育形式等三个方面进行思考,为幼儿园的语言教育活动提供参考。     

体育锻炼影响大学生抑郁水平的中介变量研究

采用调查研究的方法,研究了体育锻炼量与大学生抑郁水平、身体自尊水平的关系,并检验了该研究假设的中介模型。调查结果显示,体育锻炼量与大学生抑郁水平负相关显著;体育锻炼量与大学生身体自尊水平相关显著;大学生抑郁水平与身体自尊水平负相关显著;身体自尊是体育锻炼影响大学生抑郁水平的心理中介变量。     

体育锻炼的持续时间对大学生抑郁水平、身体自尊水平的影响及验证中介模型

本文采用实验的方法，旨在研究体育锻炼的持续时间对大学生抑郁水平、身体自尊水平的影响，同时验证本研究假设的理论模型，实验结果显示：①4周的体育锻炼就能使大学生的抑郁水平、身体自尊水平发生明显变化；②男、女大学生抑郁水平、身体自尊水平随时间变化进程有所不同；③对照组大学生抑郁水平、身体自尊水平自始至终无明显变化；④身体自尊是体育锻炼影响大学生抑郁水平的心理中介变量。