认知储备的测量及其在认知老化中的应用

认知储备是指个体自适应利用神经网络对不断增加的脑损伤进行补偿的能力, 它能显著影响个体的生理功能、认知功能和行为结果。当前有关认知储备的研究主要集中在认知储备的测量及其在认知老化研究中的应用方面。现有研究尽管已在认知储备的测量及其与认知老化的关系上取得越来越多的共识, 但在诸如认知储备测量的标准化、认知储备与认知衰退率、认知储备与脑病理的关系等问题上还存在较大争议。未来研究除应进一步标准化对认知储备的测量, 进而探讨认知储备的病理机制, 还应关注认知储备对老化的干预研究。     

人格特质对认知老化的影响及其机制

认知老化是指与年龄相关的认知功能损害.影响认知老化的因素很多,人格是这些因素背后的重要动因.当前有关人格与认知老化的研究主要探讨了不同人格特质对认知老化的具体影响及作用机制两个方面.尽管不同人格特质与认知老化的关系逐渐清晰起来,但现有研究在一些问题上仍存在争议.未来可以从不同研究范式的结果对比、人格特质对认知老化影响机制的内在问题、人格与人格特质的稳定性及其影响、人格特质对认知老化影响的本土化研究等几个方面进一步强化和拓展.     

认知老化与脑：HAROLD模型之争

HAROLD模型（Hemispheric Asymmetry Reduction in Older Adults）是指与年轻人相比,老年人在完成某些认知任务时大脑激活呈现出非对称性减弱的现象。该模型自提出以来就引发了很多质疑和研究,近几年来又有一系列的研究分别从不同角度提供了支持该模型的证据,它们包括记忆研究领域、抑制研究领域、语言认知研究领域、感觉动作研究领域和脑神经研究领域。同时也存在明显不支持该模型的研究证据,主要体现为对补偿说的批驳。通过对支持该模型和不支持该模型两方面脑成像研究成果的文献分析,发现HAROLD模型可能是一个任务特异性模型;除补偿说之外,还有其他可能的观点能够解释功能性脑成像的年龄差异;对脑激活定义的进一步明确化有助于澄清相关的争论     

线粒体与认知老化

目前,心理学、生物学、社会学等多个学科都在关注认知老化。文章从生物学的角度,论述了线粒体和认知老化的关系;介绍了线粒体在数量、分布及其能量供应,Ca2+浓度的维持,引发神经细胞凋亡,及线粒体基因等几个方面对认知老化产生的影响;描述了老化过程中线粒体功能失常引起的认知障碍;从而,为后人对认知老化产生机制的深入研究提供一定的理论依据。     

贫困对个体执行功能的影响

已有研究发现,贫困会对个体的执行功能产生消极的影响,这种影响贯穿于个体婴儿期、童年期以及成年期。贫困会影响与执行功能相关的前额叶的结构（如较小的灰质体积）。贫困个体与非贫困个体对额叶区域资源的调用方式不同,贫困个体需要使用额外的补偿资源来监测和抑制对干扰物的反应。贫困会通过压力、认知剥夺以及父母养育等因素直接或间接的影响个体的执行功能。今后该领域的研究应关注贫困影响执行功能的调节变量（如自我肯定、自我调节）,建立贫困影响执行功能的综合模型（如考虑贫困经历时间等）,立足执行功能的可塑性,通过认知干预提高贫困个体的执行功能。     

心理贫困：概念、表现及其干预

长期物质贫困产生特殊的心理后果——心理贫困。心理贫困指的是不利于贫困阶层摆脱贫困的心理与行为模式,主要表现为 “志向失灵”与“行为失灵”,即抱负与志向缺位,理念和意识扭曲,能力与行为方式错位,还易于做出不利于脱贫的决策行为;长此以往,就陷入“贫穷—特定心理与行为模式—继续贫穷”的恶性循环。对此,研究者们先后开发了有条件现金转移项目、减少认知资源损耗项目、“转移和坚持”心理干预策略、社会阶层流动信念干预策略、公平感提升策略等干预方案。该领域研究及其相关成果对“精准”扶贫,促进社会公平、增加人类福祉具有重要意义。未来研究应在整合的干预方案和本土化的干预方案等方面予以加强。     

心理贫困：概念、表现及其干预

长期物质贫困产生特殊的心理后果——心理贫困。心理贫困指的是不利于贫困阶层摆脱贫困的心理与行为模式,主要表现为 “志向失灵”与“行为失灵”,即抱负与志向缺位,理念和意识扭曲,能力与行为方式错位,还易于做出不利于脱贫的决策行为;长此以往,就陷入“贫穷—特定心理与行为模式—继续贫穷”的恶性循环。对此,研究者们先后开发了有条件现金转移项目、减少认知资源损耗项目、“转移和坚持”心理干预策略、社会阶层流动信念干预策略、公平感提升策略等干预方案。该领域研究及其相关成果对“精准”扶贫,促进社会公平、增加人类福祉具有重要意义。未来研究应在整合的干预方案和本土化的干预方案等方面予以加强。     

行为贫困陷阱的心理机制与管理对策：基于认知与动机双视角

借鉴行为经济学家开创的应用行为决策于贫困研究的新范式, 选取我国“连片特困地区”的贫困者为研究对象。首先建构“认知和动机双视角的行为贫困陷阱”的立论模型; 然后通过“贫困所致认知后果影响后继决策行为的心理机制和神经机制”, 以及“贫困所致认知和动机后果共同影响后继决策行为的作用机制”来探索贫困所致心理后果与后继决策行为间的因果效应; 最后进行“贫困所致认知功能改变影响后继决策行为的随机控制实验”和“贫困所致自我认同改变影响后继决策行为的现场干预研究”, 旨在通过“扶志和扶智”达到“授人以渔”, 并从中提炼出可供扶贫政策参考的管理对策。     

认知老化对于老年人决策过程的影响:动机的调节作用

有关老化和决策制定的研究并没有发现一致的年龄差异。从决策过程的角度,论述了老化对于决策制定的多层面影响。从认知层面来讲,流体认知能力的衰减会使老年人在决策制定前搜索更少的信息,使用非补偿性策略,基于属性进行信息搜索和比较;晶体认知能力的相对保持则在一定情况下弥补了这种消极影响;从动机层面来讲,关注情绪管理目标的老年人会倾向于寻求更多积极的信息,为了避免权衡诱发的消极情绪而更多地使用非补偿性策略。动机对于认知老化的消极影响有调节作用。具体来说,社会情绪选择理论和选择性投入假设认为,当决策任务符合老年人的社会目标,即情绪管理目标时,能够激活老年人投入认知资源的动机,从而缓解认知资源的衰减对于老年人决策表现的消极影响。未来的研究需要通过实验设计进一步探索动机与认知的交互作用,将多种过程追踪技术结合起来,明晰动机和认知能力在老年人决策制定中的作用。另外考虑到在社会目标方面的年龄差异,对于老年人决策质量的衡量应该更加注重主观决策质量。     

家庭社会经济地位对流动儿童认知能力的影响:父母教养方式的中介作用

以北京市某小学三、四年级的133名流动儿童和129名非流动儿童为被试,采用问卷和行为实验的方法,探讨家庭社会经济地位对流动儿童认知能力的影响,以及父母教养方式在其中的中介作用。结果发现：（1）流动儿童的工作记忆、元认知能力显著低于非流动儿童,家庭社会经济地位较非流动儿童更低,父母教养方式更消极;（2）流动儿童家庭社会经济地位与元认知显著正相关,父母教养方式中多个维度与元认知显著相关,而只有母亲过度干涉与保护与注意力显著负相关;（3）在流动儿童中,父亲情感温暖与理解部分中介家庭社会经济地位对儿童元认知的影响,效应量为30%。     

Childhood Aggression and Unconventionality: Impact on Later Academic Achievement,Drug Use,and Workforce Involvement

The interrelation of childhood aggression, unconventionality, academic orientation, work involvement, and drug use was explored. Data were obtained for the research participants when they were 5 to 10 years old. Follow-up interviews were conducted when the participants were 15 to 20 years old and again at 21 to 26 years old. Latent variable causal analysis was used, and the findings reveal long-term relations between early childhood aggression and adolescent problem behavior in the academic and occupational areas. The findings also indicate that adolescent drug use generates an early involvement with adult role behaviors, such as work at the expense of further education. Implications of the findings for prevention are discussed.     

经济地位和计量地位:社会地位比较对主观幸福感的影响及其年龄差异

采用麦克阿瑟梯子启动方法对个体的社会地位比较进行启动,主要探讨社会经济地位和社会计量地位对年轻人和老年人主观幸福感作用的年龄差异。120名年轻人(27.26±4.80岁)和120名老年人(65.12±6.49岁)参加了正式实验。实验首先测量被试的主观幸福感,3~7天后启动社会地位比较,随后再次测量主观幸福感。社会地位比较分为4种启动条件,即经济上行比较、经济下行比较、计量上行比较和计量下行比较,被试被随机分配到其中一种启动条件。结果发现:年轻人的主观幸福感更容易受到社会经济地位比较的影响,而老年人的主观幸福感更容易受到社会计量地位比较的影响。由于原有的等级评定方式并未验证启动的有效性,补充实验通过对麦克阿瑟梯子进行改进降低了锚定化的影响,为启动的有效性提供了直接的证据。本研究验证了主观幸福感悖论,并从社会比较的角度解释了老年人维持主观幸福感的机制,同时改进了麦克阿瑟梯子等级评定方法使其适用于中国情境。     

The cognitive functioning of older adult instrumental musicians and non-musicians

This study examined similarities and differences in the cognitive profiles of older adult instrumental musicians and non-musicians. We compared neuropsychological test scores among older adult non-musicians, low-activity musicians (<10 years of lessons), and high-activity musicians (≥10 years of lessons), controlling for self-reported physical and social activity, years of education, and overall health. Significant differences among groups were found on tasks of visual spatial ability, naming, and executive functioning. No significant differences were found on tests of attention/processing speed, or episodic memory. The current study supports late life cognitive benefits of early musical training, but only in select cognitive domains, including language, executive functioning, and visual spatial ability. The results are discussed in the context of cognitive reserve and aging.     

“时间贫穷”对跨期决策和前瞻行为的影响及其认知机制

紧张的社会节奏使人们感觉时间正在变少,从而产生时间匮乏的心理感知和思维模式,这一现象概括为"时间贫穷"。"时间贫穷"会对个体认知判断、情绪和行为控制力产生重要影响。通过行为科学和认知神经科学相结合的研究方法,从行为反应-心理机制-神经机制三个层面研究时间贫穷对跨期决策和前瞻行为的影响。研究分为3个部分:(1)时间贫穷对个体认知判断、情绪和行为控制力的影响;(2)时间贫穷对跨期决策的影响;(3)组织中时间贫穷对前瞻行为的影响。通过系列研究,拟解决3个关键问题:(1)时间贫穷如何影响人们的认知判断,导致非理性决策行为?(2)时间贫穷影响认知判断和跨期决策的神经机制究竟是什么?(3)时间贫穷对管理决策带来哪些挑战?对这些问题的深入探讨,不仅对行为决策理论的发展有重要贡献;而且对组织如何进行有效的管理制度设计,避免个体和组织陷入"时间贫穷陷阱",同样有很强的实践意义。     

Social Networks as a Factor in Volunteering Among Elderly Japanese with Lower Socioeconomic Status

We investigated the effect of social networks on volunteering, which is known to be beneficial for people and society, among elderly Japanese of lower socioeconomic status. Western studies have demonstrated that social networks boost volunteering among wealthy people because of the norm that they should help the less fortunate. However, wealthy East Asians do not share this norm. Therefore, socioeconomic variables and volunteering tend not to be significantly related in Japan. We hypothesized that social networks would be more important to volunteering among the Japanese elderly, especially among people of a lower socioeconomic status. A total of 768 respondents (319 men, 432 women, 17 sex unspecified; M_age = 73.99 years, SD = 7.40 years) completed the survey. The results indicated that social networks were positively related to volunteering only among people with lower financial status. This result suggests that social networks can increase opportunities and help less advantaged elderly people to reap the benefits of volunteering.     

路径知识习得的认知老化效应

年龄与路径知识习得的关系是空间与认知老化两大领域研究的重要议题。老年人在面对不同的路径学习环境时呈现出不同的认知老化表现。以往与年龄相关的路径知识习得能力变化的研究, 主要支持了认知老化衰退理论。然而近来发现随着年龄增长, 老年人保留了一种空间认知补偿能力。由此, 在对前人文献进行回顾和反思的基础上, 整合路径知识习得的认知老化表现及机制以探究缓解空间认知老化可能的内部因素和外部有效措施。     

The importance of impaired physical health and age in normal cognitive aging

The objective of this study was to investigate the importance of impaired physical health and age in normal cognitive aging. In our cross-sectional, clinical and explorative study, medical and neuropsychological data from 118 voluntary healthy controls aged 26-91 years were collected from five recruitment occasions. Health was assessed according to a criterion reflecting clinical and subclinical severity. The examinations included a clinical investigation, brain neuroimaging, and a comprehensive neuropsychological assessment. Regression analyses showed a significant incidence of clinical and subclinical medical disorders that explained 10.8% of the variation in cognitive performance, while age-related impairment explained 5.6%. Findings of the central nervous system were important but various other medical findings explained about half of the health-related variation. Cognitively demanding tasks were more susceptible to impaired physical health while tasks comprising salient motor- and visual spatial elements were more prone to be impaired by age. Our findings suggest (1) that impaired physical health is more important than chronological age in accounting for cognitive impairment across the adult lifespan, (2) that age and health dissociate with regard to cognitive functions affected, and (3) that selection for so-called "super healthy" elderly people might be justified in cognitive research. Because the prevalent diseases in normal aging are potentially preventable, the present findings promise good prospect for prevention of future cognitive disability among elderly people.     

Differences in false recollection according to the cognitive reserve of healthy older people

We present an associative recognition experiment comparing three samples of healthy people (young people, older people with high cognitive reserve [HCR], and older people with low cognitive reserve [LCR], with each sample consisting of 40 people), manipulating stimuli repetition during the study phase. The results show significant differences among the three samples in their overall performance. However, these differences are not due to a different use of familiarity, but rather due to a different way of using recollection: although there are no differences in the hit rates between the HRC and LRC samples, the LCR group makes significantly more recollective false alarms than the HCR group. Moreover, repetition provokes an increase in the recollective false alarms in the LCR group, but this does not occur in the group of young people or in the HCR group. These findings are explained in terms of recollection-based monitoring errors and seem to provide support for the cognitive reserve hypothesis.