Nodal structure and the partitioning of equivalence classes

By definition, all of the stimuli in an equivalence class have to be functionally interchangeable with each other. The present experiment, however, demonstrated that this was not the case when using post-class-formation dual-option response transfer tests. With college students, two 4-node 6-member equivalence classes with nodal structures of A-->B-->C-->D-->E-->F were produced by training AB, BC, CD, DE, and EF. Then, unique responses were trained to the C and D stimuli in each class. The responses trained to C generalized to B and A, while the responses trained to D generalized to E and F. Thus, each 4-node 6-member equivalence class was bifurcated into two 3-member functional classes: A-->B-->C and D-->E-->F, with class membership precisely predicted by nodal structure. A final emergent relations test documented the intactness of the underlying 4-node 6-member equivalence classes. The coexistence of the interchangeability of stimuli in an equivalence class and the bifurcation of such a class in terms of nodal structure was explained in the following manner. The conditional discriminations that are used to establish a class also imposes a nodal structure on the stimuli in the class. Thus, the stimuli in the class acquire two sets of relational properties. If the format of a test trial allows only one response option per class, responding on those trials will be in accordance with class membership and will not express the effects of nodal distance. If the format of a test trial allows more than one response option per class, responding on those trials will be determined by the nodal structure of the class. Thus, the relational properties expressed by the stimuli in an equivalence class are determined by the discriminative function served by the format of a test trial.     

3～5岁幼儿在主题-规则冲突条件下的类比推理

本研究采用经典类比任务,考察了3～5岁幼儿在主题-规则冲突条件下类比推理发展的水平与特点.结果表明:(1)在无主题联想条件下,幼儿的单维类比推理在3～4岁迅速发展,4～5岁发展较为平缓,而双维类比推理在3～5岁仍处于较低水平.(2)在主题—规则冲突条件下,幼儿在单维类比推理中表现出一定的主题联想优势反应;幼儿在双维类比推理中表现出较强的主题联想优势反应,年龄特点为:3岁幼儿有较强的主题联想优势反应,4岁幼儿的主题联想优势反应明显下降,而5岁幼儿又表现出较强的主题联想优势反应.     

对称场景中朝向一致性对内在参照系的影响

采用部分场景再认范式研究了对称场景中物体朝向的一致性对内在参照系建立的影响。被试在实验1中沿对称轴方向学习无朝向物体组成的场景; 实验2中沿对称轴方向学习有朝向物体组成的场景; 实验3中沿对称轴与物体朝向方向学习与实验2相同的场景。结果表明：(1)物体朝向一致性影响了对称场景中内在参照方向的选择; (2)无论是否存在观察视点的干扰, 观察者选择对称轴和物体的一致朝向作为内在参照方向的可能性没有显著差异。     

肢体严重毁损伤保留与否的循证思考

肢体严重毁损伤的修复是当今医学领域的一个研究热点。从循证医学角度对肢体严重毁损伤的保肢与截肢提出思考并加以阐述,同时结合当前我国医疗环境提出一些这方面的倡议。     

理性看待微创外科

所谓“微创”,乃是传统外科发展的伸延和提升。微创不等于无创,微创需要科学的决策,同时微创要运用循证医学。微创具有广阔的前景,但它的治疗之路依然很长。它需要进一步的完善。目前,还不是丰收的季节。     

Relating different perspectives on how outcomes of behavior influence behavior

Many researchers have tackled the question of how behavior is influenced by its outcomes. Some have adopted a nonmechanistic (functional) perspective that attempts to describe the influence of outcomes on behavior. Others have adopted a mechanistic (cognitive) perspective that attempts to explain the influence of outcomes on behavior. Orthogonal to this distinction, some have focused on the influence of outcomes that a behavior had in the past, whereas others also consider the influence of outcomes that a behavior might have in the future. In this article, we relate these different perspectives with the goal of reducing misunderstandings and fostering collaborations between researchers who adopt different perspectives on the common question of how behavior is influenced by its outcomes.     

Calibration accuracy of a judgmental process that predicts the commercial success of new product ideas

We examine the accuracy of forecasts of the commercial potential of new product ideas by experts at an Inventor's Assistance Program (IAP). Each idea is evaluated in terms of 37 attributes or cues, which are subjectively rated and intuitively combined by an IAP expert to arrive at a forecast of the idea's commercialization prospects. Data regarding actual commercialization outcomes for 559 new product ideas were collected to examine the accuracy of the IAP forecasts. The intensive evaluation of each idea conducted by the IAP produces forecasts that accurately rank order the ideas in terms of their probability of commercialization. The focus of the evaluation process on case‐specific evidence that distinguishes one idea from another, however, and the corresponding neglect of aggregate considerations such as the base rate (BR) and predictability of commercialization for new product ideas in general, yields forecasts that are systematically miscalibrated in terms of their correspondence to the actual probability of commercialization. Copyright © 2007 John Wiley & Sons, Ltd.     

循证医学与靶向治疗——心血管病治疗前沿领域的辩证思考

循证医学与靶向治疗均透露着哲学的智慧,体现着哲学思想。循证医学符合现代医学科学性、先进性、系统性要求,集中体现了科学的医学认识论和实践观：靶向冶疗理论认为疾病的产生有具体的原因,最好的治疗是从病因学的角度,从基因蛋白的水平找准靶点进行治疗,靶向治疗理论贯穿了唯物主义可知论的观点。在心血管病治疗的临床实践中我们应当将循证医学与靶向治疗两者有机地统一,通过优势互补,取长补短,弥补两种方法各自的不足,发扬其长处,共同促进心血管病治疗学的发展。     

用科学的证据和科学的管理指引心血管疾病的防治

心血管疾病的防治不仅仅是心血管医生的问题,还是一个在循证医学引领下的一个全民生活方式改变的问题,也需要多学科相关专业的联盟,涉及心血管疾病治疗规范的形成与普及,对于疾病发生、发展各个阶段的科学管理更是冠心病的防治效果的重要保障。本文针对心血管病冠心病预防的具体实施,从几方面打开了一个全新的视野。     

简论惠栋标帜"汉学"的易学特色

论文分"崇尚汉易家法"、"融通汉易师法"、"批评图书易学"种"学术价值与思想意义"四部分,论述了乾嘉著名易学大师惠栋的易学研究。论文指出:一、惠栋研究《周易》,重视汉易的家法,融通汉易师法,提倡复归汉代的象数易学,体现了他对传统易学的继承与超越;二、作为经学大师,惠栋企图借鉴汉代象数易学理论来指导易学研究,既是他诠释易学当代价值的认真尝试,也是他以独特的方式延续了象数易学的生命;三、惠栋梳理汉易各家源流、勾勒其象数学特点,祛除宋儒图书易学中的臆说的流弊,成为清代易学研究的一个成功典范,具有转变当时学风与确立十八世纪经学研究方向的意义。