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571.
To study the neural bases of semantic composition in language processing without confounds from syntactic composition, recent magnetoencephalography (MEG) studies have investigated the processing of constructions that exhibit some type of syntax-semantics mismatch. The most studied case of such a mismatch is complement coercion; expressions such as the author began the book, where an entity-denoting noun phrase is coerced into an eventive meaning in order to match the semantic properties of the event-selecting verb (e.g., ‘the author began reading/writing the book’). These expressions have been found to elicit increased activity in the Anterior Midline Field (AMF), an MEG component elicited at frontomedial sensors at 400 ms after the onset of the coercing noun [Pylkkänen, L., & McElree, B. (2007). An MEG study of silent meaning. Journal of Cognitive Neuroscience, 19, 11]. Thus, the AMF constitutes a potential neural correlate of coercion. However, the AMF was generated in ventromedial prefrontal regions, which are heavily associated with decision-making. This raises the possibility that, instead of semantic processing, the AMF effect may have been related to the experimental task, which was a sensicality judgment. We tested this hypothesis by assessing the effect of coercion when subjects were simply reading for comprehension, without a decision-task. Additionally, we investigated coercion in an adjectival rather than a verbal environment to further generalize the findings. Our results show that an AMF effect of coercion is elicited without a decision-task and that the effect also extends to this novel syntactic environment. We conclude that in addition to its role in non-linguistic higher cognition, ventromedial prefrontal regions contribute to the resolution of syntax-semantics mismatches in language processing. 相似文献
572.
Participants were asked to draw inferences about correlation from single x,y observations. In Experiment 1 statistically sophisticated participants were given the univariate characteristics of distributions of x and y and asked to infer whether a single x, y observation came from a correlated or an uncorrelated population. In Experiment 2, students with a variety of statistical backgrounds assigned posterior probabilities to five possible populations based on single x, y observations, again given knowledge of the univariate statistics. In Experiment 3, statistically naïve participants were given a problem analogous to that given in Experiment 1, framed verbally. Experiment 4 replicated Experiment 3 but added an "impossible to determine" response option. Models that rely on computing sample correlations make no predictions about these investigations. From a Bayesian perspective, participants' inferences in all four experiments tended to make probabilistically valid inferences as long as the single datum was directional. The results are discussed in light of the Brunswikian notion of vicarious functioning. 相似文献
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574.
Peter H. Schwartz 《Theoretical medicine and bioethics》2009,30(3):199-213
With the growing focus on prevention in medicine, studies of how to describe risk have become increasing important. Recently,
some researchers have argued against giving patients “comparative risk information,” such as data about whether their baseline
risk of developing a particular disease is above or below average. The concern is that giving patients this information will
interfere with their consideration of more relevant data, such as the specific chance of getting the disease (the “personal
risk”), the risk reduction the treatment provides, and any possible side effects. I explore this view and the theories of
rationality that ground it, and I argue instead that comparative risk information can play a positive role in decision-making.
The criticism of disclosing this sort of information to patients, I conclude, rests on a mistakenly narrow account of the
goals of prevention and the nature of rational choice in medicine.
相似文献
Peter H. SchwartzEmail: |
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576.
There have been few theoretical investigations of risk attitude within Cumulative Prospect Theory (CPT). Unlike expected utility theory, in CPT risk attitude is affected by loss aversion and decision weight distortions as well as utility curvature for both gains and losses. We introduce two variants of the risk premium—the total risk premium relative to expected value, and the behavioural risk premium relative to the imputed behavioural expected value. Approximate solutions for each using Pratt's [(1964). Risk aversion in the small and in the large. Econometrica, 32, 122-136] methodology show that the CPT risk premium is composed of two components: the first, analogous to the Pratt-Arrow coefficient of risk aversion, governs the contribution of the curvature of the value function to risk aversion; the second governs the first-order contribution of loss aversion. Both of these terms are made more complex by the introduction of decision weights. We analyse the contribution of each component and provide sufficient conditions to ensure risk aversion in CPT. 相似文献
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578.
Hester DM 《Theoretical medicine and bioethics》2007,28(5):357-372
Although there are many different moral arguments concerning the use of Best Interests in neonatal decision-making, there
seems in practice a firm commitment to application of the concept. And yet, there is still little reflection given by practitioners
about what employing a Best Interest determination means in infant care. The following lays out a comprehensive taxonomy of
interest-sources in order to provide for more robust considerations of what constitutes best interests of/for neonates. 相似文献
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580.
Vocational choice: A decision making perspective 总被引:1,自引:0,他引:1
Henry Sauermann 《Journal of Vocational Behavior》2005,66(2):273-303
We propose a model of vocational choice that can be used for analyzing and guiding the decision processes underlying career and job choices. Our model is based on research in behavioral decision making (BDM), in particular the choice goals framework developed by Bettman, Luce, and Payne (1998). The basic model involves two major processes. First, the selection of a decision strategy according to four choice goals: maximizing decision accuracy, minimizing cognitive effort, minimizing negative emotion, and maximizing justifiability of the decision. Second, the construction of situation-specific preferences, which can reflect irrelevant task and context factors such as the evaluation mode. This basic model is extended to account for social influences and the long decision time typical of most career and job decisions. We review research on vocational choice in light of this model, discuss normative implications for counseling, and outline a research agenda for studying vocational choice from a behavioral decision making perspective. 相似文献