科技干扰对青少年智能手机成瘾的影响:核心自我评价与心理需求网络满足的作用

采用问卷调查法,以4372名中学生为研究对象,考察核心自我评价和心理需求网络满足在亲子间科技干扰与青少年智能手机成瘾之间的中介作用。结果表明:(1)亲子间科技干扰可显著正向预测青少年智能手机成瘾;(2)在控制了性别、年龄之后,科技干扰可分别通过核心自我评价和心理需求网络满足间接地影响青少年智能手机成瘾。     

Applying Western models of volunteering in Hong Kong: The role of empathy,prosocial motivation and motive–experience fit for volunteering

The present research investigates the applicability of prominent Western volunteering frameworks in Hong Kong. Two cross‐sectional surveys involving a total of 268 respondents were conducted. In Study 1, we tested a model of volunteering among 149 Hong Kong Chinese adult individuals (M_age = 34.8 years; 51.7% female) that examines antecedents and outcomes of voluntary engagement. Results show that prosocial motivation relates to volunteering, and that volunteering in turn predicts life satisfaction. Unexpectedly, and unlike studies in Western settings, other‐oriented empathy was not related to volunteering. Study 2 tests the propositions of the Volunteer Process Model (VPM) among 119 Hong Kong Chinese volunteers (M_age = 36.9 years; 58.0% female). Findings largely support the VPM: our results indicate that the link between motives, voluntary service length and frequency is mediated by satisfaction with volunteering. Moreover, findings suggest that a fit between motives and experience seems relevant for increasing volunteers' satisfaction with their service. Results of both studies suggest that Western volunteering models can be applied to volunteering in East Asian cultures when culture‐specific adaptations are considered.     

如何统计寺院丛林中的“香火”现象

西方宗教的区位张力分布可用"钟形曲线"来进行描述,但对于包括中、日、韩等国在内的东方宗教来说,该曲线却完全不适用。东方宗教可用"不对称的下凹曲线"来进行整体的描述与把握。相应地,针对东方寺院丛林中的"香火"现象,其统计项目与原则也有所不同。     

不同场认知方式个体完成心理旋转任务时神经效能的差异:来自皮层慢电位的证据

为探讨场独立个体在心理旋转时与场依存个体相比是否会表现出更高的神经效能以及两者在完成此任务上的皮层分布.选取不同场认知方式个体为被试,采用ERP技术研究其完成心理旋转任务时皮层的慢电位.结果发现:在完成心理旋转任务时,场依存个体皮层负慢波的波幅明显大于场独立个体的;场依存个体大脑中区和右区负慢波的波幅明显大于场独立个体的,表明场依存个体比场独立个体在完成任务时需投入更多的资源,从而说明场认知方式是影响神经效能的一个因素.     

Effect of metastable Cr(Mo)s/Cr(Mo)a powders on mechanical alloying the immiscible Cu–Mo–Cr system

Metastable-state alloy powders are usually synthesised by milling and occur as products of mechanical alloying (MA), but they are rarely used as starting materials for other MA processes. In this work, metastable-state alloy powders, including supersaturated solid-solution Cr(Mo)s and amorphous Cr(Mo)a were prepared in advance. Then, the Cr(Mo)s/Cr(Mo)a powder mixture was mechanically alloyed with elemental Cu to form Cu–Mo–Cr alloy. The effects of the metastable-state powder Cr(Mo)s/Cr(Mo)a on MA of the immiscible Cu–Mo–Cr system were evaluated. Phases and microstructures of the milled powders were analysed by XRD and TEM, respectively. The results show that amorphous Cu-60wt.%Cr(Mo) and supersaturated solid-solution Cu-20wt.%Cr(Mo) alloy powders can be synthesised by MA. It is concluded that MA of the Cu–Mo–Cr ternary alloy system is significantly promoted when elemental Cu powder is milled with metastable-state alloy powder Cr(Mo)s/Cr(Mo)a. Furthermore, the promoting effect of amorphous Cr(Mo)a on MA the Cu–Mo–Cr alloy system is much greater than that of supersaturated solid-solution Cr(Mo)s, during the milling process.     

熟练中-英双语者对多义词早期识别中语义和语法的相互作用

以中、英文的多义词为材料, 采用跨语言隐蔽启动的实验范式, 考察在无语境条件下熟练中–英双语者对多义词的早期识别。结果表明：(1)熟练中–英双语者表现出显著的隐蔽翻译启动效应, 当目标词是主要翻译对等词时, 启动效应更加显著。(2)翻译对等词的性质、多义词的义项联系程度以及是否是词类歧义词都影响熟练中–英双语者对中、英多义词的早期加工。(3)在无语境条件下, 词类信息在意义通达的早期就已经激活, 并且同语义信息之间存在着交互作用。根据研究结果, 扩展和修正了分布式概念表征模型。     

Types of Leaders Across the Organizational Hierarchy: A Person-Centered Approach

Leadership pipeline research typically has taken a “skill-centered” approach to describe the changing skill requirements across management positions. However, the current study advances previous research by taking a “person-centered” approach to investigate the prevalence of different leader types along the organizational hierarchy. Based on an inverse principle components analysis, this study identified three unique patterns of skill configuration. We labeled the three leader types: (a) Driven Experts, (b) Principled Partners, and (c) Charismatic Advocates. It was found that the prevalence of one type (Principled Partners) decreased across organizational levels, whereas the other two types (Driven Experts and Charismatic Advocates) increased in the prevalence from the low to high management levels. The implications of the findings on leadership development are discussed.     

Local Dynamic Stability of the Locomotion of Lower Extremity Joints and Trunk During Backward Upslope Walking

Backward slope walking was considered as a practical rehabilitation and training skill. However, its gait stability has been hardly studied, resulting in its limited application as a rehabilitation tool. In this study, the effect of walking direction and slope grade were investigated on the local dynamic stability of the motion of lower extremity joints and trunk segment during backward and forward upslope walking (BUW/FUW). The local divergence exponents (λ_S) of 16 adults were calculated during their BUW and FUW at grades of 0%, 5%, 10%, and 15%. Mean standard deviation over strides (MeanSD) was analyzed as their gait variability. Backward walking showed larger λ_S for the abduction-adduction and rotational angles of knee and ankle on inclined surface than forward walking, while λ_S for hip flexion-extension angle at steeper grades was opposite. No grade effect for any joint existed during BUW, while λ_S increased with the increasing grade during FUW. As to the trunk, walking direction did little impact on λ_S. Still, significant larger λ_S for its medial-lateral and vertical motion were found at the steeper grades during both FUW and BUW. Results indicate that during BUW, the backward direction may influence the stability of joint motions, while the trunk stability was challenged by the increasing grades. Therefore, BUW may be a training tool for the stability of both upper and lower body motion during gait.     

When disfluency is—and is not—a desirable difficulty: The influence of typeface clarity on metacognitive judgments and memory

There are many instances in which perceptual disfluency leads to improved memory performance, a phenomenon often referred to as the perceptual-interference effect (e.g., Diemand-Yauman, Oppenheimer, & Vaughn (Cognition 118:111–115, 2010); Nairne (Journal of Experimental Psychology: Learning, Memory, and Cognition 14:248–255, 1988)). In some situations, however, perceptual disfluency does not affect memory (Rhodes & Castel (Journal of Experimental Psychology: General 137:615–625, 2008)), or even impairs memory (Glass, (Psychology and Aging 22:233–238, 2007)). Because of the uncertain effects of perceptual disfluency, it is important to establish when disfluency is a “desirable difficulty” (Bjork, 1994) and when it is not, and the degree to which people’s judgments of learning (JOLs) reflect the consequences of processing disfluent information. In five experiments, our participants saw multiple lists of blurred and clear words and gave JOLs after each word. The JOLs were consistently higher for the perceptually fluent items in within-subjects designs, which accurately predicted the pattern of recall performance when the presentation time was short (Exps. 1a and 2a). When the final test was recognition or when the presentation time was long, however, we found no difference in recall for clear and blurred words, although JOLs continued to be higher for clear words (Exps. 2b and 3). When fluency was manipulated between subjects, neither JOLs nor recall varied between formats (Exp. 1b). This study suggests a boundary condition for the desirable difficulty of perceptual disfluency and indicates that a visual distortion, such as blurring a word, may not always induce the deeper processing necessary to create a perceptual-interference effect.     

Energetic effects of dopants on the eutectoid decomposition of Nb–Si in situ composites

The influences of doping elements (Ti, Zr, Hf, V, Ta, Cr, Mo, W and Al) on the heats of formation of Nb, Nb₅Si₃ and Nb₃Si have been studied using first-principles pseudopotential plane-wave method based on density functional theory. Site preferences of dopants in Nb₅Si₃ and Nb₃Si intermetallics are first determined by comparing the heats of formation of the systems with different site occupations of the doping atoms. The partitionings of dopants between the equilibrium phases Nb and Nb₅Si₃ of Nb–Si in situ composites are then discussed and compared with experimental results. Phase partitioning behaviours of the alloying elements are found to depend strongly on the number of their valence electrons. By calculating the enthalpy of reaction regarding the eutectoid decomposition of Nb₃Si phase, we conclude that Ta is a Nb₃Si stabiliser while other dopants destabilise Nb₃Si at the investigated concentration.