Mediating mechanisms in a school-based drug prevention program: first-year effects of the Midwestern Prevention Project

Describes (a) the effects of a social-influences-based drug prevention program (the Midwestern Prevention Project) on the mediating variables it was designed to change and (b) the process by which the effects on mediating variables changed use of drugs (tobacco, alcohol, and marijuana). Students in 42 middle schools and junior high schools in Kansas City, Missouri, and Kansas City, Kansas, were measured in the fall of 1984 (N = 5,065) and again 1 year later (N = 5,008) after 24 of the schools had been through the program. Compared to students in control schools, students in program schools became less likely to express belief in the positive consequences of drug use, less likely to indicate that they would use such drugs in the future, more likely to report that their friends were less tolerant of drug use, and more likely to believe that they were better able to communicate with their friends about drug or school problems. Change in perceptions of friends' tolerance of drug use was the most substantial mediator of program effects on drug use. There was evidence that intentions to use and beliefs about the positive consequences of use may also mediate program effects on drug use.     

节律在听觉言语理解中的作用

言语理解是听者接受外部语音输入并且获得意义的心理过程。日常交流中,听觉言语理解受多尺度节律信息的影响,常见有韵律结构节律、语境节律、和说话者身体语言节律三方面外部节律。它们改变听者在言语理解中的音素判别、词汇感知以及言语可懂度等过程。内部节律表现为大脑内神经振荡,其能够表征外部言语输入在不同时间尺度下的层级特征。外部节律性刺激与内部神经活动的神经夹带能够优化大脑对言语刺激的处理,并受到听者自上而下的认知过程的调节进一步增强目标言语的内在表征。我们认为它可能是实现内外节律相互联系并共同影响言语理解的关键机制。对内外节律及其联系机制的揭示能够为理解言语这种在多层级时间尺度上具有结构规律的复杂序列提供了一个研究窗口。     

智能时代的工程心理学

智能技术为智能时代的工程心理学研究和应用提供了新的机遇。为此, 系统提出了智能时代工程心理学的工作框架。该工作框架包括工程心理学研究和应用的对象、核心问题空间、学科理念、研究重点、应用范围、方法等。智能时代的人机关系呈现出一种新的形式: 人机组队式的人机合作关系。“以人为中心的人工智能”应该是智能时代工程心理学的学科理念。针对智能技术, 近期工程心理学研究者开始开展围绕新型人机关系的理论框架和基本问题、人机组队中的心理结构和决策控制、人机交互等方面的研究工作。为有效支持智能系统的研发, 概括总结了一些工程心理学新方法和提升的方法。最后, 针对当前工程心理学所面对的一些挑战提出了具体的建议。     

孔子思想中的君子人格：心理学测量的探索

君子人格是中国文化(尤其是儒学思想)中的理想的人格特质, 对于理解中国文化心理具有重要意义, 但鲜有实证研究。通过经典文本的理论分析与心理测量的实证分析相结合的方法, 选取《论语》中孔子对君子的论述编制初测条目, 通过探索性和验证性因素分析、效标关联效度分析等实证研究方法(总样本量 = 1916), 对孔子思想中的君子人格的内在结构进行了探索, 并编制了具有良好信效度的测量工具。结果表明, 孔子思想中的君子人格包含了智仁勇、恭而有礼、喻义怀德、有所不为、持己无争5个因素。此外还考察了其与大五人格、中国人价值观、自我和谐、合作与竞争人格倾向、亲社会倾向等效标变量的相关关系。     

Guidelines for the Investigation of Mediating Variables in Business Research

Business theories often specify the mediating mechanisms by which a predictor variable affects an outcome variable. In the last 30 years, investigations of mediating processes have become more widespread with corresponding developments in statistical methods to conduct these tests. The purpose of this article is to provide guidelines for mediation studies by focusing on decisions made prior to the research study that affect the clarity of conclusions from a mediation study, the statistical models for mediation analysis, and methods to improve interpretation of mediation results after the research study. Throughout this article, the importance of a program of experimental and observational research for investigating mediating mechanisms is emphasized.     

Multilevel mediation analysis: The effects of omitted variables in the 1–1–1 model

Multilevel mediation analysis examines the indirect effect of an independent variable on an outcome achieved by targeting and changing an intervening variable in clustered data. We study analytically and through simulation the effects of an omitted variable at level 2 on a 1–1–1 mediation model for a randomized experiment conducted within clusters in which the treatment, mediator, and outcome are all measured at level 1. When the residuals in the equations for the mediator and the outcome variables are fully orthogonal, the two methods of calculating the indirect effect (ab, c – c′) are equivalent at the between‐ and within‐cluster levels. Omitting a variable at level 2 changes the interpretation of the indirect effect and will induce correlations between the random intercepts or random slopes. The equality of within‐cluster ab and c – c′ no longer holds. Correlation between random slopes implies that the within‐cluster indirect effect is conditional, interpretable at the grand mean level of the omitted variable.     

关于器官"交叉移植"现象的法律解读

由于我国<人体器官移植条例>规定活体器官移植只限于在配偶、直系亲属、三代以内旁系血亲以及"因帮扶形成的亲情关系"之间进行,然而在现实生活中却出现了多例器官"交叉移植"现象.如何界定、规范、处理这种法律事件,防止可能出现的法律风险以及伦理问题,已经成为当前人体器官移植医学实践与法律实践中的一个重要问题.     

腹膜间皮细胞EMT在腹膜纤维化中的研究进展及意义

腹膜透析是终末期肾衰患者肾脏替代治疗的重要手段,腹膜纤维化导致腹透效能下降及超滤衰竭,制约着腹膜透析的应用。腹膜间皮细胞上皮细胞间充质转化是腹膜纤维化的起始和可逆环节,因此预防和逆转EMT的发生发展可能是阻止和延缓腹膜纤维化、超滤衰竭的最佳策略,并将带来巨大的社会和经济效益。     

决策中损益值大小效应的发生条件及机制再探 —— 一种齐当别视角及兼对视角本身的一些探讨

通过两个研究,损益值大小效应在1元~1亿元的广阔范围内,以及在只采用选择反应模式的条件下得到了进一步探讨,其机制也在齐当别模型的全新视角下得到了讨论;此外,齐当别模型本身以及模型的经典判断任务也得到了探讨。结果发现：基于选择反应模式时,损益值大小效应在获得情景中稳定存在,并只存在一个风险倾向的拐点,而它在损失情景中则不存在;损益值大小效应的机制能够被齐当别模型很好的解释;齐当别模型的经典判断任务对模型预测效能的检验力不足,但其与新设计的维度内判断任务联合后却有很大改善;齐当别模型对损失情景中的均含0结果值的决策任务的解释力还有待进一步探讨