科学的技术与经验的技术——兼论中西医学的差异

一、科学的技术与经验的技术对于技术,学界有多种理解。本文直接采用笔者在《从太和殿的建造看经验、技术和科学的关系》一文中对技术的定义:技术是为达到特定目的而采用的有效手段和方法。它包括工具(包括人自身)和对工具的运用(技能、操作规则)(田松,1997年,第256页);并根据来源将技术简单地分为两类:科学的技术和经验的技术。其中技术的两项基本元素工具和技能,借鉴了     

Relating inter-individual differences in metacognitive performance on different perceptual tasks

Human behavior depends on the ability to effectively introspect about our performance. For simple perceptual decisions, this introspective or metacognitive ability varies substantially across individuals and is correlated with the structure of focal areas in prefrontal cortex. This raises the possibility that the ability to introspect about different perceptual decisions might be mediated by a common cognitive process. To test this hypothesis, we examined whether inter-individual differences in metacognitive ability were correlated across two different perceptual tasks where individuals made judgments about different and unrelated visual stimulus properties. We found that inter-individual differences were strongly correlated between the two tasks for metacognitive ability but not objective performance. Such stability of an individual’s metacognitive ability across different perceptual tasks indicates a general mechanism supporting metacognition independent of the specific task.     

注意缺陷多动障碍儿童的表征搜索

为探索ADHD儿童在时间维度上的视觉选择性注意的基本机制,揭示其表征搜索能力是否存在缺陷,研究采用RSVP范式,通过实验材料(字母和数字)和呈现方式操作两种搜索方式:序列搜索和平行搜索,比较ADHD儿童(18名)和控制组儿童(17名)的成绩差异。结果发现:①在平行搜索和序列搜索条件下,ADHD儿童的成绩均低于正常控制组;②比较平行搜索和序列搜索条件下的成绩变化,以及由低难度到高难度上成绩的变化,无论是正确率还是反应时均发现ADHD儿童和正常儿童具有相同的成绩变化模式。结论认为ADHD儿童在视觉选择性注意的基本搜索机制上并不存在明显缺陷。     

高低行为激活系统个体在赌博任务下的决策模式

为考察不同行为激活系统/行为抑制系统下的个体在Iowa赌博任务反应模式下的决策行为,本研究采用人格问卷与行为实验相结合的方式,探讨了人格、冲动和行为决策间的关系。结果发现:(1)行为激活系统三个维度与行为决策存在显著负相关,行为激活系统低分组的IGT得分较高,行为激活系统高分组的IGT得分较低,而冲动特征与IGT得分相关不显著;(2)行为激活系统高、低分者在IGT任务上差异显著,且行为激活系统高分组者在收益-风险并存情境中表现出"即时收益优先"的决策模式。结果提示,在收益-风险并存情境中,高行为激活的人格特征者倾向风险决策模式。     

Bayesian estimation of semiparametric nonlinear dynamic factor analysis models using the Dirichlet process prior

Parameters in time series and other dynamic models often show complex range restrictions and their distributions may deviate substantially from multivariate normal or other standard parametric distributions. We use the truncated Dirichlet process (DP) as a non‐parametric prior for such dynamic parameters in a novel nonlinear Bayesian dynamic factor analysis model. This is equivalent to specifying the prior distribution to be a mixture distribution composed of an unknown number of discrete point masses (or clusters). The stick‐breaking prior and the blocked Gibbs sampler are used to enable efficient simulation of posterior samples. Using a series of empirical and simulation examples, we illustrate the flexibility of the proposed approach in approximating distributions of very diverse shapes.     

Brighten up: Smiles facilitate perceptual judgment of facial lightness

The metaphoric expression ‘bright smile’ may reflect the actual judgment of facial lightness under varying emotional expressions. The present research examined whether people in fact judge smiling faces as perceptually brighter than frowning faces. Four studies demonstrated that participants believed smiling faces were brighter compared to frowning faces in a binary choice task and in an absolute judgment task. The results suggest that emotional expressions (i.e., smiles and frowns) can bias judgments of facial brightness in ways consistent with the metaphor. Among other implications, such results suggest that stereotypes about darker-skinned individuals may be attenuated by smiles.     

与任务无关的刺激-反应联结对中老年人自动加工的影响

采用掩蔽启动范式,选取字母和数字作为刺激,任务因素为与当前任务无关的处于预备状态的刺激-反应联结,探讨自上而下的任务因素对中老年人自动加工过程的影响。发现中老年被试的自动反应激活过程不受到自上而下的当前无关的、处于预备状态的刺激-反应联结作用的影响,自动加工是完全自动化的。     

人际感恩对关系维持的影响

尽管关系维持策略对形成良好的人际关系和增强个人福祉有着重要意义,但也增加了个体被拒绝的风险和痛苦。以往研究已经发现人际感恩一方面能在关系面临威胁时激活威胁缓冲策略修复人际关系,另一方面也能在威胁解除时激活关系增强策略建立和促进人际关系,但人际感恩也增加了使用非适应关系维持策略的可能。此外,自我评价和他人评价有助于解释人际感恩的关系维持功能。未来研究应从二元互动视角考察人际感恩的关系维持功能;从多元评价视角考察自我评价和他人评价在人际感恩对关系维持的影响中扮演的角色;并结合多种研究方法拓展人际感恩的关系维持功能研究。     

论法家“法治”学说的定性问题

<正>近代以来,法家"以法治国"(《韩非子·有度》,下引该书只注篇名。类似说法亦见于《管子·明法》)、"不别亲疏,不殊贵贱,一断于法"(《史记·太史公自序》)的"法治"思想引起了学界的普遍关注。"西学源于诸子说"的盛行,使得薛福成、黄遵宪皆认为先秦法家之"法治"与西方法治殊途同归。不料这种观点引起了沈家本、严复等人的强烈批评,他们明确主张法家"法治"乃"专