儿童左右概念发展的实验研究

儿童正确地掌握左右概念要經过长期而复杂的发展道路。不同年龄儿童掌握左右概念的水平、反映出各該年龄儿童思維发展的水平。前人的研究指出:儿童对左右方向的辨别,开始是以他自身的左右为推算的出发点,构成感性推算系統。然后在这基础上,形成感性推算系統和有关的詞——“左”“右”的联     

复合应用题結构的初步探討

問題学生解答应用題的思維过程受制約于題目的結构。雅魯楚克曾指出:“学生解題依課題的复杂程度和課題的数学結构、依学生的准备性为轉移而出現不同程度的解題过程。所以分析課題的結构特点,是了解学生解題的整个思維过程的一个途径。     

Bayesian Factor Analysis as a Variable-Selection Problem: Alternative Priors and Consequences

Factor analysis is a popular statistical technique for multivariate data analysis. Developments in the structural equation modeling framework have enabled the use of hybrid confirmatory/exploratory approaches in which factor-loading structures can be explored relatively flexibly within a confirmatory factor analysis (CFA) framework. Recently, Muthén & Asparouhov proposed a Bayesian structural equation modeling (BSEM) approach to explore the presence of cross loadings in CFA models. We show that the issue of determining factor-loading patterns may be formulated as a Bayesian variable selection problem in which Muthén and Asparouhov's approach can be regarded as a BSEM approach with ridge regression prior (BSEM-RP). We propose another Bayesian approach, denoted herein as the Bayesian structural equation modeling with spike-and-slab prior (BSEM-SSP), which serves as a one-stage alternative to the BSEM-RP. We review the theoretical advantages and disadvantages of both approaches and compare their empirical performance relative to two modification indices-based approaches and exploratory factor analysis with target rotation. A teacher stress scale data set is used to demonstrate our approach.     

Work-to-Life Spillover Effect of Leader–Member Exchange in Groups: The Moderating Role of Group Power Distance and Employee Political Skill

While prior studies have focused on the effect of leader–member exchange (LMX), representing a dyadic differentiated exchange relationship between a leader and followers, on employees’ job-related outcomes, how LMX at the group level influences one’s life domain has been ignored. The present study shifted attention to the relationship between LMX mean and employee life satisfaction as well as the boundary conditions. Using a sample of 471 employees from 53 groups and hierarchical linear modeling, we examined the cross-level main effect of LMX mean on life satisfaction and the moderation of group power distance and individual political skill. The results revealed that LMX mean had a work-to-life spillover effect on employee life satisfaction. Employee political skill positively moderated the relationship between LMX mean and life satisfaction, whereas group power distance negatively moderated the relation. Theoretical and practical implications were further discussed.     

Criminal law,multicultural jurisdictions and cultural evidence

This article investigates whether providing minority groups with power over criminal law can create injustices that target lesbians, gays and bisexuals within those groups. In order to carry out the task of evaluating to what extent providing power over criminal law to minority groups can result in negative consequences for lesbian, gay and bisexual individuals, this paper assesses the work of Ayelet Shachar. I contend that her model leaves lesbians, gays and bisexuals within minorities vulnerable because her division of jurisdictions collapses when put into practice; additionally, her principles do not provide normative guidance for avoiding jurisdictions that criminalise homosexuality, and that protect lesbian, gay and bisexual individuals from violence. This rejection of transformative accommodation, however, does not mean that cultural evidence is irrelevant for criminal procedures. Rather, I assert that cultural evidence is relevant for trials and including it does not jeopardise the interests of lesbian, gay and bisexual individuals.     

Differences in the micromechanical properties of dendrites and interdendritic regions in superalloys

Statistical analysis of white-light interferometry (WLI) experiments performed on Ni-based single-crystal superalloys (SX) have revealed a different height distribution between the dendritic cores (DCs) and the interdendritic regions (IRs) of the polished samples. The micromechanical property difference is largely ascribed to the uneven distribution of the alloying elements. In this context, possible reasons for this difference are discussed by comparing with different experiment results obtained by previous researchers, and a proposal forecasting the hardness ratio of IRs/DCs is put forward.     

不同任务类型条件下4～6年级儿童比例推理策略的表现

随机选取小学4~6年级被试86名,从辅助策略、比例推理策略的策略选择和策略效用三方面,通过五种类型的天平任务考察儿童比例推理策略的表现。结果表明:(1)儿童最常使用手指动作辅助加工基本数量信息。辅助策略的使用率随年龄增长而减少,五年级开始使用出声思维,反映出元认知能力的发展。(2)在正式学习比例知识之前,各年级儿童都能使用两种以上策略,也能根据任务难度自发产生新策略,具备策略选择的多样性和适应性。其中,三个年级均能使用定性比例推理策略(双维策略,IIIA策略,补偿策略),表明儿童初步认识了距离和重量两个维度的共变关系。此外,六年级儿童能使用"运货车策略"将冲突问题灵活地化解为简单问题。(3)儿童的错误策略表现为:在冲突任务中盲目使用补偿策略、简单策略或加法策略。(4)分层回归分析表明,在控制年龄后,儿童的一般推理能力越高,其对重量策略的依赖性越低,且可能更容易发掘距离维度的意义,其使用运货车策略的频次更多。此外,一般推理能力对解决冲突类天平任务的正确次数有正向预测作用。