Extraordinary plastic behaviour of the γ′ precipitate in a directionally solidified nickel-based superalloy

The deformation behaviour of the γ′ precipitate in a directionally solidified nickel-based superalloy is investigated using microscopic observations after tensile testing at room temperature. It is found that coarse γ′ precipitates (604 nm) are sheared by strongly coupled dislocations, and some γ′ precipitates are elongated to approximately 3–6 times of their original lengths. It reveals that, at room temperature, the γ′ precipitate within the experimental superalloy has a significant plastic deformation capacity in comparison with Ni₃Al bulk alloys. Based on the experimental observations, the extraordinary plastic behaviour of the γ′ precipitate is analysed.     

Imagining Garage Start-Ups: Interactive Effects of Imaginative Capacities on Entrepreneurial Intention

This article describes a structural examination of the interaction among different imaginative capacities and the entrepreneurial intention of electrical and computer engineering students. Two studies were combined to confirm the factor structure of survey items and test the hypothesised interaction model. The results indicated that imaginative capacity has 3 dimensions: conceiving, initiating, and transforming, whereas entrepreneurial intention comprises 2 factors: conviction and preparation. In addition, the results indicated that initiating imagination strongly affected entrepreneurial conviction and preparation; conceiving imagination positively predicted entrepreneurial conviction, whereas transforming imagination negatively predicted entrepreneurial preparation. The results also indicated that students possessing high, as well as those possessing low, conceiving and transforming imaginations demonstrated a high level of entrepreneurial preparation. In addition, an increase in transforming imagination increases the preparation of students possessing low initiating imagination and reduces the preparation of students possessing high initiating imagination. For developing a novel approach to conduct research on entrepreneurial intention and for discussing the practical implications of the findings, this study explicates alternative methods of cultivating students, promoting their interests, and enabling entrepreneurial behaviour in them by stimulating their imaginative capacities.     

Reproductive Health CHOICES for Young Adults with Sickle Cell Disease or Trait: Randomized Controlled Trial Outcomes over Two Years

Interventions to assist reproductive health decision-making in populations affected by sickle cell disease (SCD) or trait (SCT) lack proven efficacy over time. Our aim was to compare effects of CHOICES, a Web-based multimedia education program on implementing informed reproductive plans, and usual care education (e-Book) on reproductive knowledge, intention, and behavior over 24 months. We randomized 234 participants with SCD (n?=?138) or SCT (n?=?96) (age 18–35 years, 35 % male, 94 % African American) to CHOICES and e-Book groups. Participants completed a sickle cell-specific reproductive measure before and four times after the intervention (6, 12, 18 and 24 months). Compared to the e-Book group the CHOICES group had significantly more improvement in knowledge over time (p?=?.004) but not intention (p?=?.18) or behavior (p?=?.69). At baseline, 114 (48.7 %) participants reported having partners who would not put the couple at risk for their children inheriting SCD. Of the 116 (49.6 %) at-risk participants, a higher poroportion of those who were in the CHOICES group chose partners that reduced their risk by the last visit than the e-Book group (p?=?.04). Study findings provide important insights for designing a national trial of the CHOICES intervention focusing on subjects whose partner status puts them at risk for having a child with SCD.     

基本心理能力老化的中介变量

从整合思路,针对认知老化的四个中介变量建立基本心理能力老化的结构方程模型。样本来自北京三个社区的217位60-85岁的老人。采用计算机化的任务测查五项基本心理能力和加工资源的各项指标。结果表明：(1)感觉功能、加工速度和加工容量是基本心理能力老化的重要中介变量;(2)基本心理能力老化的中介作用表现出层次性。感觉功能是最基础的一层中介作用,它通过加工速度和加工容量间接调节基本心理能力的老化;加工速度对基本心理能力老化的作用受感觉功能的影响,同时也通过加工容量对基本心理能力的老化起作用;加工容量在基本心理能力老化的中介模型中直接与基本心理能力产生联系,但是其61％的变异来自感觉功能和加工速度;(3)负启动测验与颜色词启动测验不能共同表达加工抑制,以颜色词启动值作为观测指标的加工抑制不能进入基本心理能力老化的中介模型。     

非故意损害下的过度补偿效应

个体的补偿和报复行为是人际损害领域的研究重点。本研究通过将损害者和受害者置于同一情境,揭示了非故意损害中的过度补偿效应。实验包括虚拟和真实两种非故意损害情境,损害方式包括经济损失和肉体伤害。组间变量是损害者、受害者和中立者三种角色,因变量是被试在分配任务中留给搭档或自己的分数或金钱。结果表明,在阅读或经历了相同的非故意损害事件后,损害者补偿给受害者的分数和金钱会显著高于受害者留给自己的数量,即过度补偿效应。     

道德判断的外语效应：心理距离的中介与外语熟练度的调节作用

结合建构水平理论,基于多项式加工树构建算法,通过3个实验验证道德外语效应,并尝试探究道德外语效应的可能机制及其边界。实验1的结果表明中文为母语、英文为外语的个体的道德判断受语言的影响。与母语条件相比,外语条件下个体的道义论道德判断更少。实验2的结果进一步表明心理距离可以完全中介语言对道德判断的影响。实验3发现外语熟练度可以调节语言对心理距离的影响。研究结果再次验证了道德外语效应,并表明心理距离的中介作用和外语熟练度的调节作用,拓展了道德外语效应发生机制的可能解释。     

反馈负波及其理论解释

反馈负波（feedback related negativity, FRN）是由代表行为错误或失去金钱等负性反馈刺激诱发的一种脑电波成分,出现在刺激呈现后250~300ms左右,偶极子源定位发现这一成分产生于前扣带回附近。对于FRN的功能意义的解释主要有强化学习理论和情绪动机假说,前者认为FRN反映的是神经系统对反馈刺激的认知加工过程,而后者认为FRN反映的是对情绪动机意义的评价过程。两种理论框架下还有一些目前研究仍待解决的问题,可能是未来研究的方向     

气郁体质对女性抑郁作用的纵向研究:一个有调节的中介模型

目的:为了明确气郁体质对女性抑郁的作用机制,研究通过纵向设计构建了一个有调节的中介模型,探讨了气郁体质和抑郁之间冗思的中介作用和生活应激事件的调节作用。方法:采用问卷法对468名女大学生进行追踪,通过间隔一年两个时间点的纵向设计,对女性的气郁体质、抑郁、冗思及生活应激事件进行调查。结果:交叉滞后模型结果显示,气郁体质可以显著预测女性一年后的抑郁水平; 冗思在气郁体质对一年后抑郁的影响中起纵向中介作用; 生活应激事件调节了气郁体质对一年后抑郁作用的直接路径和后半路径。结论:气郁体质与抑郁之间的纵向中介调节模型成立,这提示气郁体质的女性可以通过减少冗思,优化应对生活应激事件的方式来改善抑郁。     

短视频顾客灵感的触发机制及其对顾客融入的影响

短视频顾客灵感(SVCI)是顾客灵感概念在短视频情境下的具象化, 是顾客由营销类短视频中获得的从接受营销引导的想法到转变为对消费相关目标的内在追求的激活状态。短视频顾客灵感的前因包括视频因素、主播因素和个人特质因素; 短视频顾客灵感中的观念式启发和行动式启发两个维度的交叉可以产生短视频顾客灵感状态矩阵, 矩阵中四种灵感状态在一定的条件下可以转化; 短视频顾客灵感通过直接贡献(顾客购买)和间接贡献(顾客推荐、顾客影响力和顾客知识)两条途径对顾客融入产生正向影响; 商品类型和消费者-主播关系强度在短视频顾客灵感对顾客融入的作用中起到调节作用; 短视频顾客灵感有助于揭示短视频营销中顾客灵感的触发机制及其对顾客融入的影响, 可以帮助消费类短视频主播和短视频平台产生更高效的营销内容和策略, 同时可以帮助消费者提升短视频购物的消费体验。     

性别和情境危险程度对行人危险知觉的影响：来自ERP的证据

采用事件相关电位技术,探讨性别和情境危险程度对行人危险知觉的影响。实验采用三类真实交通情境图片作为材料,包括无危险情境图片、低度危险情境图片和高度危险情境图片。结果发现：低度危险情境条件下,女性的N1潜伏期更短;在N1波幅上,高度危险情境大于无危险情境或低度危险情境;在P3波幅上,男性大于女性,低度危险情境大于无危险情境或高度危险情境。说明早期视觉加工阶段,女性对低度危险情境更敏感;男性比女性给予交通情境更多的注意;情境危险程度能够调节危险知觉过程中的注意分配。