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991.
Sebastian Sequoiah-Grayson 《Journal of Philosophical Logic》2008,37(1):67-94
This article provides the first comprehensive reconstruction and analysis of Hintikka’s attempt to obtain a measure of the
information yield of deductive inferences. The reconstruction is detailed by necessity due to the originality of Hintikka’s
contribution. The analysis will turn out to be destructive. It dismisses Hintikka’s distinction between surface information and depth information as being of any utility towards obtaining a measure of the information yield of deductive inferences. Hintikka is right to
identify the failure of canonical information theory to give an account of the information yield of deductions as a scandal,
however this article demonstrates that his attempt to provide such an account fails. It fails primarily because it applies
to only a restricted set of deductions in the polyadic predicate calculus, and fails to apply at all to the deductions in
the monadic predicate calculus and the propositional calculus. Some corollaries of these facts are a number of undesirable
and counterintuitive results concerning the proposed relation of linguistic meaning (and hence synonymy) with surface information.
Some of these results will be seen to contradict Hintikka’s stated aims, whilst others are seen to be false. The consequence
is that the problem of obtaining a measure of the information yield of deductive inferences remains an open one. The failure
of Hintikka’s proposal will suggest that a purely syntactic approach to the problem be abandoned in favour of an intrinsically
semantic one. 相似文献
992.
Multiple-set canonical correlation analysis (Generalized CANO or GCANO for short) is an important technique because it subsumes
a number of interesting multivariate data analysis techniques as special cases. More recently, it has also been recognized
as an important technique for integrating information from multiple sources. In this paper, we present a simple regularization
technique for GCANO and demonstrate its usefulness. Regularization is deemed important as a way of supplementing insufficient
data by prior knowledge, and/or of incorporating certain desirable properties in the estimates of parameters in the model.
Implications of regularized GCANO for multiple correspondence analysis are also discussed. Examples are given to illustrate
the use of the proposed technique.
The work reported in this paper is supported by Grants 10630 and 290439 from the Natural Sciences and Engineering Research
Council of Canada to the first and the second authors, respectively. The authors would like to thank the two editors (old
and new), the associate editor, and four anonymous reviewers for their insightful comments on earlier versions of this paper.
Matlab programs that carried out the computations reported in the paper are available upon request. 相似文献
993.
Philippe Delquié 《决策行为杂志》2008,21(1):91-109
Participants in four studies were faced with everyday‐life decision scenarios involving risk, such as purchasing an airline ticket whose price may change. They were asked to state their maximum willingness to pay (WTP) for resolving the uncertainty with either perfect information or an option. The two are strategically equivalent, therefore, should be valued in the same way. Across all experiments, individuals tend to value the option more than the information. In addition, the distributions of responses reveal frequent and gross violations of normative bounds. Contrary to normative predictions, no relationship is found between individuals' valuation of the gamble and their reported WTP for information or option. Furthermore, although participants pay attention to the probabilities of outcomes in valuing the gambles, they ignore the probabilities in valuing uncertainty resolution. Several reasoning heuristics that participants use to come up with a value of information are identified, and it appears that the Information and Option contexts tend to trigger different heuristics. Shift in reference point and regret are consistent with the Information–Option valuation discrepancy. Copyright © 2007 John Wiley & Sons, Ltd. 相似文献
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995.
时间限制和成就动机对职业决策线索加工的影响 总被引:1,自引:0,他引:1
采用信息板技术探讨了时间限制条件下成就动机对职业决策线索加工的影响.结果表明:(1)时间限制影响了个体职业选择过程的平均决策时间、信息搜索深度和信息搜索模式,但未对决策满意度造成显著影响;(2)追求成功动机影响决策时的信息搜索模式,避免失败动机影响决策时的信息搜索深度. 相似文献
996.
比较广告是一种新异但颇具争议的广告形式。研究者们对比较广告的概念和传播效果已有较为统一的认识,新近研究的重点是比较广告传播的作用机制及影响其传播效果的因素。文章从比较广告的传播效果、传播机制和影响因素三方面进行了系统的考察,提出现有研究在机制探讨和影响因素控制上的一些不足,并展望了研究亚文化下比较广告的方向 相似文献
997.
本研究采用遮挡范式,考察了专职公交车驾驶员对不同类型、速度和方向运动物体的碰撞时间(TTC)估计.结果发现,被试对不同类别和速度运动物体的TTC估计有显著差异.这表明,除了视觉信息和物理信息之外,运动物体的概念信息也是影响横向运动TTC估计的重要因素. 相似文献
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