Logic programs, iterated function systems, and recurrent radial basis function networks

Graphs of the single-step operator for first-order logic programs—displayed in the real plane—exhibit self-similar structures known from topological dynamics, i.e., they appear to be fractals, or more precisely, attractors of iterated function systems. We show that this observation can be made mathematically precise. In particular, we give conditions which ensure that those graphs coincide with attractors of suitably chosen iterated function systems, and conditions which allow the approximation of such graphs by iterated function systems or by fractal interpolation. Since iterated function systems can easily be encoded using recurrent radial basis function networks, we eventually obtain connectionist systems which approximate logic programs in the presence of function symbols.     

The Impact of “Display‐Set” Options on Decision‐Making

The way a choice set is constructed can have a significant influence on how individuals perceive and evaluate their options, and make decisions between them. Here, I examine whether a “display set” of visible but unavailable options can exert these same types of influences on whether or not to choose a single (target) item. Across a series of experiments, purchase intent is increased when the display set and target are drawn from the same category, but decreased when the display and target items are mismatched. This effect is shown to depend on perceived similarity, such that increasing display‐target similarity increases purchase intent towards the target. Furthermore, contrary to the predictions made by previous neural and behavioral research on choice sets, the relative value and/or number of display‐only items have no significant impact on these decisions. These findings reveal a novel choice behavior in commonly encountered settings such as online marketplaces. Copyright © 2016 John Wiley & Sons, Ltd.     

汉语语音型阅读障碍儿童的范畴知觉技能

选取汉语中存在语音意识缺陷的阅读障碍儿童、正常儿童和成人各25名为被试,考察了语音型阅读障碍儿童是否存在言语知觉缺陷.言语知觉任务采用范畴知觉范式,要求被试识别合成或自然的语音范畴连续体.结果发现语音型阅读障碍儿童识别合成和自然的刺激都表现出范畴知觉缺陷,对范畴内刺激的识别缺少一致性;个体分析表明大部分语音型阅读障碍儿童有较低的识别函数斜率;回归分析表明言语知觉技能通过语音意识的中介作用于阅读能力的发展.     

发展性阅读障碍的脑区连接异常

过去几十年中, 研究者基于脑区功能定位的思想对发展性阅读障碍的神经机制进行了大量的研究, 揭示出阅读障碍者在特定脑区的异常。近些年, 考虑到阅读加工过程的复杂性以及需要多脑区协同参与的特点, 越来越多的研究者从脑区连接的角度探讨阅读障碍的神经机制。结果发现阅读障碍者在阅读相关脑区间的白质结构连接和功能连接上均表现出异常, 这说明阅读技能受损和脑区连接异常之间存在着密切的联系。未来的研究还需进一步探讨脑区连接异常和特定脑区异常之间的关系, 以及结合基因、脑、行为和环境等多个因素探寻阅读障碍的发生机制。     

等级数据的测量不变性检验及影响因素模拟研究

研究介绍了针对等级数据的模型建构（LRV,潜在反应变量模型）和参数估计（WLSMV）方法,以及在此基础上的测量不变性检验（DIFFTEST）方法,同时采用蒙特卡洛模拟研究方法,考察样本总量大小、组间样本量对比情况、阈值差异程度、量表长度等因素,对DIFTEST进行针对等级数据的测量不变性检验效果的影响情况,以及WLSMV估计方法下的参数复原情况。研究结果发现WLSMV估计方法参数的复原效果很好;DIFFTEST的一类错误概率达到可接受水平,在大样本情况下、组间样本量基本相等、阈值差异程度较大时,DIFFTEST检测力较好。在控制测量不变性遭受破坏的项目个数情况下,随着测验长度的增加,DIFFTEST的检测力下降。     

从传统针灸学到现代针灸学——针灸现代化50年之回顾

现代针灸学的理论基础不同于传统针灸学,前者是以运用现代科学技术、方法对相关问题的研究所获取的现代科学意义上的规律作为指导理论,机理的阐明完全立足于现代科学意义的相关知识体系,并以神经一内分泌一免疫网络学说及针灸效应的四大规律为该体系的理论核心;而传统针灸学则是以阴阳五行学说、脏腑气血学说、经络学说等为基本理论;在临床上,现代针灸学充分利用现代诊疗技术和方法,以辨病为主导,针刺手法注重的是强弱刺激与针刺效应的关系;而传统针灸学则是借助四诊八纲以辨证为主导,针刺手法强调的是补泻。     

抑制性控制的认知与人格因素

本文回顾了认知与人格心理学对抑制基本概念及其加工模型的研究,指出基于认知、人格和神经基础三个维度的整合分析将为抑制性控制提供更为深广的研究空间。     

Prediction and classification in nonlinear data analysis: Something old,something new,something borrowed,something blue

Prediction and classification are two very active areas in modern data analysis. In this paper, prediction with nonlinear optimal scaling transformations of the variables is reviewed, and extended to the use of multiple additive components, much in the spirit of statistical learning techniques that are currently popular, among other areas, in data mining. Also, a classification/clustering method is described that is particularly suitable for analyzing attribute-value data from systems biology (genomics, proteomics, and metabolomics), and which is able to detect groups of objects that have similar values on small subsets of the attributes.This article is based on the Presidential Address Jacqueline Meulman gave on July 9, 2003 at the 68th Annual Meeting of the Psychometric Society held near Cagliari, Italy on the island of Sardinia.—Editor     

社会性发展迟滞大学生的表情加工及其类别知觉

本研究比较了社会性发展迟滞大学生与正常大学生的表情加工,探讨迟滞个体表情加工的特点及可能原因,还验证面部表情类别知觉效应。采用Morph情绪面孔实验发现：除恐惧情绪外,基本表情的强度越大被试对表情的识别越好;但迟滞个体的表情加工速度比正常个体慢,对愤怒的识别也更差;他们辨别混合表情中悲伤、愤怒的类别界线都发生偏移。迟滞个体的表情加工能力不如正常个体,并且对悲伤具有反应偏向,对愤怒存在加工缺陷。