The effects of direction similarity in visual working memory: Behavioural and event-related potential studies

Object similarity can improve visual working memory (VWM) performance in the change-detection task, but impair the recognition performance when it occurs at retrieval of VWM in the recognition task. The effect of direction similarity is an issue that has not been well resolved. Furthermore, electrophysiological evidence in support of the mechanisms that underlie the effects of similarity is still scarce. In the current study, we conducted three behavioural experiments to examine the effects of direction similarity on memory performance with regard to both the encoding and retrieval phases of VWM and one event-related potential (ERP) experiment to explore the neural signatures of direction similarity in VWM. Our behavioural studies indicated that direction similarity improved performance when it occurred at the encoding phase but impaired performance when it occurred at the retrieval phase. Moreover, the ERP experiment showed that the amplitude of the contralateral delay activity (CDA) increased with the increasing set size for similar but not dissimilar directions. In addition, the CDA amplitude for similar directions was lower than that for dissimilar directions at set size 2. Taken together, these findings suggest that direction similarity at encoding has a positive effect on VWM performance and at retrieval has a negative effect. Given that VWM capacity depends on information load and the number of objects, the positive effect of similarity may be attributed to reduced information load of memory objects.     

When leader–member exchange differentiation improves work group functioning: The combined roles of differentiation bases and reward interdependence

Drawing on social hierarchy theory, we develop a contingency model of leader–member exchange (LMX) differentiation in which LMX differentiation is positively and negatively related to group cooperation and group social undermining, respectively, when it is based on the group members’ performance, but the relations are reversed (i.e., negative and positive, respectively) when it stems from a leader's personal liking of the members. In addition, we propose that the moderating effects of the performance and personal liking bases of LMX differentiation are magnified by the levels of reward interdependence. Specifically, under a high (vs. low) level of reward interdependence, LMX differentiation based on performance more strongly relates to high group cooperation and low group social undermining, whereas LMX differentiation with a personal liking basis is more likely to decrease group cooperation and increase group social undermining. Group cooperation and social undermining are then hypothesized to convey the three‐way interactive effects of LMX differentiation, its two bases, and reward interdependence on subsequent group performance. Analyses of data from 328 sales groups of a large retailer support the core part of our contingency model of LMX differentiation.     

元认知的神经机制:元认知功能、脑区与脑网络

元认知是指个体对当前进行的认知活动的监测和调节。通过对元认知神经机制研究的梳理,归纳出两条研究主线:一条主线以具体元认知加工的脑区激活研究为主,主要考察元认知与认知过程的分离及典型元认知加工的共享性和特异性。研究发现元认知加工主要与前额叶有关,还涉及脑岛、顶叶、颞叶和楔前叶等部分脑区。另一条主线探讨广泛的元认知功能与广泛大脑网络的相关。研究提出了大脑的“元认知网络”的概念,发现脑损伤或病变造成的元认知功能损伤与脑功能网络有关,而非固定在某一特定脑区。建议未来的研究应重视四个方面的研究:元认知加工的具体脑区和脑功能网络,元认知神经机制的分离,元认知脑功能的损伤和元认知训练的改善作用,以及基于神经机制研究的元认知模型的建构与修正。     

学前儿童执行功能与问题行为的关系:情境和性别的特异性

运用追踪设计检验了学前儿童执行功能特定成分和问题行为跨情境和性别的关系。选取101名学前儿童（48名男孩）为研究对象,采用实验任务测量儿童的执行功能,一年后采用母亲和教师报告分别收集儿童在家庭和学校情境的问题行为。结果发现,控制儿童年龄后：（1）在男孩中,抑制控制、认知灵活性和工作记忆负向预测一年后家庭情境的外化问题,认知灵活性负向预测一年后学校情境的外化问题,抑制控制正向预测一年后学校情境的内化问题;（2）在女孩中,执行功能三个成分均不能显著预测家庭情境的问题行为,认知灵活性正向预测一年后学校情境的外化问题。执行功能三个成分与问题行为间存在不同效应模式,且存在跨情境和性别的特异性。     

冯契对马克思主义哲学的创新性探索

作为当代著名的马克思主义哲学家,冯契对马克思主义哲学做了三方面的创新性探索。首先,丰富和拓展了马克思主义认识论体系：将狭义认识论拓展为广义认识论,充实了认识论中“知觉”和“意见”两个范畴,将“疑问”和“观点”两个普通概念提升为认识论的范畴。其次,建构了独特的马克思主义辩证逻辑体系：探讨了怎样将哲学理论化为思维方法,建构了以“类”“故”“理”为骨架的逻辑范畴体系,概括了辩证逻辑方法论的五个环节。再次,梳理与概括了中国古代自然科学成就：运用与发展了比类取象、比类运数的科学方法,设计、运用了实验手段。     

基于长尾效应的儿童创伤后应激障碍转归机制及干预策略

儿童PTSD具有“长尾效应”, 疾病负担重、发展结局存在较大异质性, 但是少有研究对我国儿童PTSD的转归进行系统性研究, 其转归类型、路径尚不明晰, 更缺少促进儿童PTSD复原的干预研究。因此, 本研究拟对儿童及青少年进行追踪调查和准实验研究, 探讨儿童PTSD的发展轨迹及转归类型和机制, 验证基于学校的综合干预服务对促进儿童PTSD恢复的效果, 为儿童PTSD干预及个性化诊疗提供证据。     

Job load,job stress,and job exhaustion among Chinese junior middle school teachers: Job satisfaction as a mediator and teacher’s role as a moderator

Social Psychology of Education - Job exhaustion is not uncommon among Chinese middle school teachers, but the key antecedents of job exhaustion and the underlying mechanisms in this historically...     

Culture and the distinctiveness motive: constructing identity in individualistic and collectivistic contexts

The motive to attain a distinctive identity is sometimes thought to be stronger in, or even specific to, those socialized into individualistic cultures. Using data from 4,751 participants in 21 cultural groups (18 nations and 3 regions), we tested this prediction against our alternative view that culture would moderate the ways in which people achieve feelings of distinctiveness, rather than influence the strength of their motivation to do so. We measured the distinctiveness motive using an indirect technique to avoid cultural response biases. Analyses showed that the distinctiveness motive was not weaker-and, if anything, was stronger-in more collectivistic nations. However, individualism-collectivism was found to moderate the ways in which feelings of distinctiveness were constructed: Distinctiveness was associated more closely with difference and separateness in more individualistic cultures and was associated more closely with social position in more collectivistic cultures. Multilevel analysis confirmed that it is the prevailing beliefs and values in an individual's context, rather than the individual's own beliefs and values, that account for these differences.     

老年心血管疾病患者合并焦虑抑郁的现状及处理

如今心血管疾病成为主流慢性病,更是老年人的常见病,同时焦虑、抑郁的问题越来越受到广泛重视.作为医生首先要能够正确识别医学无法解释的焦虑、抑郁的躯体症状,运用明确的阴性的客观证据使患者了解自己症状并非器质性病变,同时给予相应的抗焦虑、抑郁的治疗,以真正消除患者的痛苦.     

中西社会文化比较视阈下我国医患矛盾解读

当前造成我国医患矛盾日益尖锐有诸多方面的因素.基于社会文化比较视角,从医疗秩序、医疗职业道德规范、诊疗出发点、行业自律性、医学模式五个层面进行中西对比,对引发我国医患矛盾冲突的原因加以分析,以期为我国政府制定医疗体制改革政策提供参考.