青少年的个人未来发展目标和担忧

目标和担忧是个体关于未来的心理表征,对个体日常指向未来的行为具有引导作用。采用青少年未来取向问卷中文版调查了近2000名初中、高中和大学青少年,结果发现,青少年的目标和对未来的担忧反映了青少年期的主要发展任务,同时它们又因被试的年龄、性别、城乡背景以及思考内容领域的不同而表现出不同的特点。     

试论营养支持在中晚期癌症患者治疗中的理性选择

几乎所有中晚期癌症患者治疗中都会或多或少应用到临床营养支持治疗,适时、正确地应用对部分中晚期患者极具积极意义,而选择性地对一部分晚期患者有限应用甚至放弃,可能是更为理性的选择。从癌的本质出发,科学地应用营养不良筛选及评定方法,使临床营养支持治疗成为中晚期癌症患者的真正需要。     

成人后期日常能力自评与操作水平的横断比较

采用自我评估与纸笔操作相结合的方法 ,对 2 3 3名 55至 74岁的成人后期被试完成七项日常活动的能力进行横断比较。结果表明 :自评能力与操作能力既存在一定的一致性 ,也存在相当大的差异性 ,各活动项目上的自评水平比操作水平要高 ;操作水平表现出随年龄增长而下降的趋势 ,从 70岁开始下降最为明显 ,而自评水平未呈现出这种变化特点 ;不同活动领域上的操作水平存在不同的发展轨迹 ;在少数活动领域具有显著的性别差异     

孔子的和谐意识及其现代价值

在中国传统文化中,和谐是一种不散的精神,孔子又是“和”理念的集大成者。他在如何处理人与人、人与社会、人与自然及个人身心关系方面都有一些独到的见解。对孔子思想中的和谐意识进行认真地梳理、审视,自觉汲取其精华,对于我们构建社会主义和谐社会,无疑具有重要的启迪和借鉴意义。     

“言”说

世上大学问多的是,但作为人的第一件大事就是要学会说话;善于用语言来表达自己的思想和观点。会不会与人沟通交流,除与环境和对象有关以外,关键一点在于自己是否有言谈,会辩的技巧;这种技巧主要体现在表达的能力上。常言道:会说话的人不抢着讲,不会讲话的人争着说。其实这一来说明自己态度不谦虚、没礼貌;二来说明个人的表现欲很强;三者说明没有表达涵养。太上爷曰:“知者不言,言者不知。”有智谋的人遇事沉稳,并不急于表现自己;同时说明夸夸其谈只不过是“纸上谈兵”、故弄玄虚、卖弄自己而已;空话一大堆,只会招来别人的厌恶、心烦。进一步…     

Training-induced and electrically induced potentiation in the neocortex

Long-term potentiation (LTP) shares many properties with memory and is currently the most popular laboratory model of memory. Although it has not been proven that memory is based on an LTP-like mechanism, there is evidence that learning a motor skill can induce LTP-like effects. This evidence was obtained in a slice-preparation experiment, which precluded within-animal comparisons before and after training. In the present experiments, Long-Evans rats were unilaterally trained to acquire a forelimb reaching and grasping skill. Evoked potentials were found to be larger in motor cortex layer II/III in the trained, compared to the untrained, hemisphere in slice, acute, and chronic preparations. Consistent with previous research, the trained hemisphere was less amenable to subsequent LTP induction. Furthermore, the application of either LTP- or LTD-inducing stimulation during the training phase of the reaching task disrupted the acquisition of the skill, providing further evidence that memory may be based on an LTP mechanism.     

Is it culture or is it language? Examination of language effects in cross-cultural research on categorization

Differences in reasoning styles between Chinese and European Americans held even when controlling for the language of testing. Bilingual Chinese organized objects in a more relational and less categorical way than European Americans, whether tested in English or in Chinese. Thus, culture affects categorization independent of the testing language. Nevertheless, language affected some Chinese bilinguals' categorization. The responses of Chinese from the Mainland and Taiwan were more relational when tested in Chinese than when tested in English. Responses of Chinese from Hong Kong and Singapore were equally relational when tested in Chinese and in English. Age and context of learning English are discussed to explain the differential language effects among different Chinese groups. Theoretical and methodological implications are discussed.     

Culture, control, and perception of relationships in the environment

East Asian cognition has been held to be relatively holistic; that is, attention is paid to the field as a whole. Western cognition, in contrast, has been held to be object focused and control oriented. In this study East Asians (mostly Chinese) and Americans were compared on detection of covariation and field dependence. The results showed the following: (a) Chinese participants reported stronger association between events, were more responsive to differences in covariation, and were more confident about their covariation judgments; (b) these cultural differences disappeared when participants believed they had some control over the covariation judgment task; (c) American participants made fewer mistakes on the Rod-and-Frame Test, indicating that they were less field dependent; (d) American performance and confidence, but not that of Asians, increased when participants were given manual control of the test. Possible origins of the perceptual differences are discussed.     

Regional grey matter volume in the posterior cingulate cortex predicts positive risk-taking: A moderation model

Positive risk-taking is a crucial element of individual creativity and social development. However, little is known regarding the relation between individual neural differences and positive risk-taking. In addition, critical thinking (CT) and gender have been proven to be two important individual-specific factors associated with risk-taking behaviour, and different levels of CT and gender may have diverse effects on the relationship between brain structure and positive risk-taking. The present study examined the relationship between positive risk-taking and regional grey matter volume (rGMV) in 292 healthy participants. The results showed that positive risk-taking was significantly positively associated with the rGMV of the posterior cingulate cortex (PCC). In addition, this study investigated individual differences in critical thinking and found that it moderated the relationship between rGMV and positive risk-taking. Individuals with lower CT had a stronger association between rGMV and positive risk-taking. Further analysis showed that for males, a greater rGMV was significantly linked to higher positive risk-taking tendency. These findings suggest that PCC evaluates risk and serves as a behavioural adaptation hub for positive risk-taking. This study thereby contributes to the literature on individual differences in brain structure and risk-taking by elucidating the moderating effects of CT and gender in healthy adults.     

语义的自动加工和选择性注意对Stroop效应的影响

本实验用正常人和聋哑人作被试进行比较,试图探讨语义的自动加工和选择性注意对Stroop效应的影响。将“红”“绿”“黄”“蓝”四个汉字中的每一个都用这四种颜色中的三种写成,然后按着事先排列好的顺序,分组呈现,并且在两种条件下分别要求被试延迟不同的时间进行反应,一种是刺激呈现前就告诉被试对“字”或“色”反应;另一种是刺激呈现后间隔不同的时间再向被试提出对“字”或“色”反应。实验结果发现,聋哑人和正常人在色—字干扰任务作业上没有明显的差异,说明语义的自动加工是一个普遍现象;而选择性注意能在很大的程度上改善被试的作业成绩,但颜色命名仍比字词反应困难;Stroop效应在延迟反应条件下发生变化,这种变化说明Stroop效应与记忆过程有联系。