Infusion of lidocaine into the dorsal hippocampus before or after the shock training phase impaired conditioned freezing in a two-phase training task of contextual fear conditioning

Learning in a contextual fear conditioning task involves forming a context representation and associating it with a shock. The dorsal hippocampus (DH) is implicated in representing the context, but whether it also has a role in associating the context and shock is unclear. To address this issue, male Wistar rats were trained on the task by a two-phase training paradigm, in which rats learned the context representation on day 1 and then reactivated it to associate with the shock on day 2; conditioned freezing was tested on day 3. Lidocaine was infused into the DH at various times in each of the two training sessions. Results showed that intra-DH infusion of lidocaine shortly before or after the context training session on day 1 impaired conditioned freezing, attesting to the DH involvement in context representation. Intra-DH infusion of lidocaine shortly before or after the shock training session on day 2 also impaired conditioned freezing. This deficit was reproduced by infusing lidocaine or APV (alpha-amino-5-phosphonovaleric acid) into the DH after activation of the context memory but before shock administration. The deficit was not due to drug-induced state-dependency, decreased shock sensitivity or reconsolidation failure of the contextual memory. These results suggest that in contextual fear conditioning integrity of the DH is required for memory processing of not only context representation but also context-shock association.     

理想与长寿

记得,一位外国名作家说过：人类不会因为时间的推移而出现老人,而往往是因为理想的破灭才出现了逝者。初听起来,此话的确有些不太顺耳,但仔细想来却又不无道理。众所周知,人之所以能成为地球生物的灵长,进而主宰了世界,就是因为人类有比较发达的大     

A business frame perspective on why perceptions of top management's bottom-line mentality result in employees’ good and bad behaviors

Emerging research suggests that bottom-line mentalities (BLMs) (i.e., a sole focus on bottom-line outcomes to the exclusion of other considerations) can have dysfunctional consequences within the workplace. However, research has yet to consider how and why BLMs may result in both beneficial and dysfunctional organizational outcomes. In the present research, we examine employees’ perceptions of top management's BLM as a type of business frame that results in two cognitive states. Under the influence of this business frame, employees may adopt a mental preoccupation with work (i.e., a state of ongoing work-related cognitions) that propels beneficial employee outcomes by reducing customer incivility and enhancing customer service performance. Yet, also in response to top management's high BLM as a business frame, employees may adopt self-interest cognitions (i.e., a cognitive state of self-interest) that instigate customer-directed unethical conduct. Across two field studies, we found general support for our hypotheses. Taken together, our findings suggest that perceptions of top management's high BLM can be a mixed blessing in that it may drive employees to adopt focused work efforts (mental preoccupation with work), but also self-interest cognitions, with each cognitive state predicting beneficial or dysfunctional behaviors. We discuss the implications of these findings and directions for future research.     

师范生心理素质评价体系的研究

用经过信度和效度检验的量表研究师范生的心理素质,表明师范生心理素质内涵丰富,包含人多内容,不同成分有着不同的贡献率,其中具有相对突出的重要成分是心理健康水平,人格特征,认知方式、元认知、智力和教育实践和知识。     

齐文化特色数据库和网站建设初探

本文研究探讨了山东理工大学图书馆正在进行的齐文化特色数据库建设中的数据源采集、数据采集标引、数据库结构以及齐文化的网站建设等问题,提出了作者对于建设特色数据库的一些见解。     

主动性人格与大学生职业成熟度的关系:一个有调节的中介模型

为考察主动性人格、职业决策自我效能感、就业压力和职业成熟度之间的关系,采用主动性人格量表、职业成熟度量表等对713名大学生进行调查。结果显示：（1）职业决策自我效能感在主动性人格与职业成熟度之间起部分中介作用,主动性人格既能直接预测职业成熟度,也通过职业决策自我效能感间接预测职业成熟度;（2）职业决策自我效能感的中介作用受到就业压力的调节,就业压力调节了职业决策自我效能感与大学生职业成熟度之间的关系。     

稀缺对个体心理和行为的影响：基于一个更加整合视角下的阐释

稀缺是由资源的真实缺乏或感知缺乏所引起的个体欲望和需求得不到满足的一种状态。稀缺作为一种普遍存在的现象对个体的情感、认知、以及行为方式产生了重要的影响, 但是不同类型的稀缺(以食物、产品、资金为代表的有形资源稀缺vs.以时间为代表的无形资源稀缺)对个体心理和行为的影响是否存在共性与差异?梳理文献发现, 有形资源稀缺会使个体产生珍惜性行为、补偿性行为和趋近性行为, 而无形资源稀缺只会使个体产生珍惜性和补偿性行为。未来研究应关注稀缺影响个体行为的边界条件, 以及时间稀缺对个体心理和行为的影响。     

无限慈悲的观音菩萨

菩萨是梵文音译“菩提萨”的简称,其菩提汉译为觉悟,萨汉译为众生,或有情(一切有感情之物),全译为觉有情、觉悟的众生之意。根据修行的层次,菩萨可分为胁侍菩萨和供养菩萨。胁侍菩萨是修行层次最高的菩萨,其修行觉悟仅次于佛或等同于佛。每尊佛都有两位或几位胁侍菩萨。在石窟壁画中经常画的“八大菩萨”,即是释迦牟尼佛左右的胁侍菩萨——文殊菩萨、普贤菩     

社会阶层与大学生网络利他行为:一个有调节的中介模型

采用问卷法对813名大学生进行调查,探讨社会阶层、公正世界信念、网络社会支持与大学生网络利他行为之间的关系及内在作用机制。结果发现：（1）客观社会阶层不能显著预测网络利他行为,主观社会阶层能正向预测网络利他行为;（2）公正世界信念在主观社会阶层与网络利他行为的关系中起部分中介作用;（3）网络社会支持调节了公正世界信念的中介作用。对于高网络社会支持个体,公正世界信念起部分中介作用;而对于低网络社会支持个体,公正世界信念的中介效应不显著,主观社会阶层对网络利他行为只有直接效应。