Le malade génétique responsable « La loi des suspects »

A patient suffers of a genetical disease. He does not wish to inform his family. Is he responsible for a lost of chances of his parents, chances to prevent the disease, or to receive care? Is there a second class of patients?     

The usefulness of the averaging rule in consumer studies: A partial replication with an eye at neuroeconomics

IntroductionInformation Integration Theory models how different pieces of information are combined by people into unified judgments. Its contribution to decision-making and to consumer studies distinctly relies on a set of empirically established algebraic models for reflecting the cognitive structure of judgments and decisions (cognitive algebra). Among these, the averaging model has particular properties, allowing for operationally distinguishing between the elusive notions of psychological value and importance.ObjectivesThe main goal of the paper is to support the applicability and robustness of the averaging model in consumer studies, by partially replicating a published study that documented averaging. Additionally, it tentatively explores potential contributions of the averaging model to neuroeconomics, by simultaneously recording ratings and electroencephalographic (EEG) responses.MethodsTwenty-five participants rated on a satisfaction scale (format 0-20) a set of experimental conditions arising from the full factorial combination of three levels of sneakers’ branded models and three levels of purchase prices, expanded with conditions in which brands were presented in isolation (sub-design). Simultaneous electrophysiological monitoring was performed with an EEG mask (international system 10-20, referenced to the mastoid apophyses). Segmentation and processing of evoked response potentials were done in Matlab. Both ratings and magnitudes of event-related potentials (ERP) components were analyzed through inspection of the factorial plots with the support of repeated-measures ANOVAs.ResultsThe rating responses revealed an averaging model, with equal weighting in a cluster of subjects and differential weighting in another, but more overall importance of the branded model variable in both cases. The only tentative suggestions of relevant neural correlates involved the LPP and P300 components of the ERP and a reduced number of EEG channels (P4, P3, Fz and T3).ConclusionsThe averaging model is robustly applicable and useful in consumer studies, both for measurement (value and importance) and consumer segmentation (cognitively based clusterization) purposes. While calling attention to the later components of the ERP at specific topographies, the paucity of EEG results suggests that ERP peak amplitude may not be a useful measure for the purpose. Apart from that, a functional measurement approach to neuroeconomics seems feasible in principle and an explorable path in the future.     

Synergistic Information Processing Encrypts Strategic Reasoning in Poker

There is a tendency in decision‐making research to treat uncertainty only as a problem to be overcome. But it is also a feature that can be leveraged, particularly in social interaction. Comparing the behavior of profitable and unprofitable poker players, we reveal a strategic use of information processing that keeps decision makers unpredictable. To win at poker, a player must exploit public signals from others. But using public inputs makes it easier for an observer to reconstruct that player's strategy and predict his or her behavior. How should players trade off between exploiting profitable opportunities and remaining unexploitable themselves? Using a recent multivariate approach to information theoretic data analysis and 1.75 million hands of online two‐player No‐Limit Texas Hold'em, we find that the important difference between winning and losing players is not in the amount of information they process, but how they process it. In particular, winning players are better at integrative information processing—creating new information from the interaction between their cards and their opponents’ signals. We argue that integrative information processing does not just produce better decisions, it makes decision‐making harder for others to reverse engineer, as an expert poker player's cards act like the private key in public‐key cryptography. Poker players encrypt their reasoning with the way they process information. The encryption function of integrative information processing makes it possible for players to exploit others while remaining unexploitable. By recognizing the act of information processing as a strategic behavior in its own right, we offer a detailed account of how experts use endemic uncertainty to conceal their intentions in high‐stakes competitive environments, and we highlight new opportunities between cognitive science, information theory, and game theory.     

Using unexpected questions to elicit information and cues to deceit in interpreter‐based interviews

We examined whether speech‐related differences between truth tellers and liars are more profound when answering unexpected questions than when answering expected questions. We also examined whether the presence of an interpreter affected these results. In the experiment, 204 participants from the United States (Hispanic participants only), Russia, and the Republic of Korea were interviewed in their native language by a native‐speaking interviewer or by a British interviewer through an interpreter. Truth tellers discussed a trip that they had made during the last 12 months; liars fabricated a story about such a trip. The key dependent variables were the amount of information provided and the proportion of all statements that were complications. The proportion of complications distinguished truth tellers from liars better when answering unexpected than expected questions, but only in interpreter‐absent interviews. The number of details provided did not differ between truth tellers and liars or between interpreter‐absent and interpreter‐present interviews.     

Attribute Dismissal and Valence Effects in Preferential Decision Processing

The processing of attribute information during preference‐based decision making is affected by both the valence of that information and its importance to the decision. Although these two factors have typically been examined separately, we propose that their effects on elaboration and encoding are often codependent. Results of four experiments demonstrate that the traditional negativity effect, whereby negative attribute information is processed more extensively than positive attribute information, obtains only for the subset of attributes perceived to be most important. Among other attributes, the negativity effect is reduced or even reversed (a positivity effect). Our findings suggest important qualifications to prevailing notions of selective information processing. Copyright © 2017 John Wiley & Sons, Ltd.     

Model for Assessing Quality of Online Health Information: A Fuzzy VIKOR Based Method

Today, tens and thousands of websites provide health‐related information on various topics to a growing number of consumers. However, the lay user is often faced with a challenge of determining the quality of information provided by one site from the other. To ensure the protection of users from sites that provide unreliable and unsafe information, there has to be a competent reviewing body that rates and ranks the quality of information provided by each site. This paper (i) proposes a new criteria framework for assessing the quality of online health information and (ii) uses a fuzzy ‘visekriterijumska optimicija i kompromisno resenje’ method to demonstrate how online health information providers could be assessed and ranked based on their quality. The fuzzy modelling uses pre‐defined linguistic variables parameterized by triangular fuzzy numbers in the assessment and subsequent ranking of providers under a particular health topic. A numerical example is demonstrated using diabetes online information providers to show how the assessment and ranking is carried out. The proposed framework provides functional basis for evaluating the quality of internet health information providers on any particular health topic. Copyright © 2015 John Wiley & Sons, Ltd.     

创造性问题解决的动态神经加工模式

先前研究基于功能特化的思想, 基本完成了创造性问题解决相关的各个关键脑区的功能定位, 但并未揭示这些关键脑区在创造活动中的动态神经活动以及它们之间的相互作用关系。本研究拟从动态的功能整合的思想出发, 采用时间序列分析和有效连通性分析方法, 对语义类问题的创造性解决中的信息选择和新颖联结形成等关键子过程的大脑动态加工模式进行研究。本研究不仅能丰富并发展创造性问题解决神经基础的研究方法, 而且能够从系统的层面, 从动态信息加工的角度加深对创造性问题解决脑机制的认识, 推动其神经理论的发展。     

小学儿童分享的发展及反馈信息的促进效应

研究以独裁者博弈任务为载体,考查了小学儿童分享行为的发展趋势,并探讨了不同来源的正向反馈信息对于儿童分享行为的促进效应。研究随机选取了小学二、四、六年级的学生共386名,每个年级的三个实验组在自然分享条件后分别接受来自权威、同伴和自我的正向反馈信息,继而完成后续任务。结果表明:(1)在自然分享情况下,六年级儿童的分享数量显著多于二、四年级儿童的分享数量;随着年级升高,儿童从倾向于利己分享逐渐转为以平分为主;(2)来自同伴和权威的正向反馈可以提高二、四年级儿童的分享数量;自我评价的正向反馈明显提高四、六年级儿童的分享数量。结论:小学儿童的分享数量和进行平分的人数比例都随年级升高而增加,来自同伴、权威和自我的正向反馈分别适用于特定年龄阶段儿童的分享行为促进。     

A pawn by any other name? Social information processing as a function of psychopathic traits

Past research has linked psychopathic traits with the ability to manipulate others, either through deception or violence. Recent observations in corporate settings suggest that enhanced interpersonal assessments might underlie this process, giving psychopathic individuals the ability to detect useful and/or vulnerable victims. To test this hypothesis, a non-forensic sample of males participated in a social memory experiment involving the recognition of faces and recalling the biographical details of artificially created characters differing in their relative career success and emotional vulnerability. High-psychopathy participants had near-perfect recognition for sad, unsuccessful female characters, but impaired memory for other characters. The findings suggest that psychopathic personality is associated with “predatory memory” even in the absence of overt criminality.