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101.
Lorenzo Rossi 《Journal of Philosophical Logic》2016,45(5):485-529
Kripke’s theory of truth (Kripke, The Journal of Philosophy72(19), 690–716; 1975) has been very successful but shows well-known expressive difficulties; recently, Field has proposed to overcome them by adding a new conditional connective to it. In Field’s theories, desirable conditional and truth-theoretic principles are validated that Kripke’s theory does not yield. Some authors, however, are dissatisfied with certain aspects of Field’s theories, in particular the high complexity. I analyze Field’s models and pin down some reasons for discontent with them, focusing on the meaning of the new conditional and on the status of the principles so successfully recovered. Subsequently, I develop a semantics that improves on Kripke’s theory following Field’s program of adding a conditional to it, using some inductive constructions that include Kripke’s one and feature a strong evaluation for conditionals. The new theory overcomes several problems of Kripke’s one and, although weaker than Field’s proposals, it avoids the difficulties that affect them; at the same time, the new theory turns out to be quite simple. Moreover, the new construction can be used to model various conceptions of what a conditional connective is, in ways that are precluded to both Kripke’s and Field’s theories. 相似文献
102.
Given a positive definite covariance matrix \(\widehat{\Sigma }\) of dimension n, we approximate it with a covariance of the form \(HH^\top +D\), where H has a prescribed number \(k<n\) of columns and \(D>0\) is diagonal. The quality of the approximation is gauged by the I-divergence between the zero mean normal laws with covariances \(\widehat{\Sigma }\) and \(HH^\top +D\), respectively. To determine a pair (H, D) that minimizes the I-divergence we construct, by lifting the minimization into a larger space, an iterative alternating minimization algorithm (AML) à la Csiszár–Tusnády. As it turns out, the proper choice of the enlarged space is crucial for optimization. The convergence of the algorithm is studied, with special attention given to the case where D is singular. The theoretical properties of the AML are compared to those of the popular EM algorithm for exploratory factor analysis. Inspired by the ECME (a Newton–Raphson variation on EM), we develop a similar variant of AML, called ACML, and in a few numerical experiments, we compare the performances of the four algorithms. 相似文献
103.
Paolo Riva Kipling D. Williams Alex M. Torstrick Lorenzo Montali 《The Journal of social psychology》2014,154(3):208-216
Research suggests that ostracism increases susceptibility to indirect forms of social influence (e.g., conformity). Yet, no study to date has explored whether the effects of ostracism extend to the most direct form of social influence—obedience. We investigated whether ostracized individuals would be more likely to obey a direct command to do something effortful in uncomfortable conditions. Participants (N = 62) were randomly assigned to be included or ostracized in Cyberball, or assigned to a control condition. They were then approached by the experimenter and commanded to go outside when temperatures were below 30°F and take 39 unique and creative photographs in the cold of winter. Ostracized participants were more likely to obey the experimenter’s command to be creative when taking photographs. No differences in obedience emerged between the inclusion and the control condition. We provided evidence completing the social influence “trifecta”: ostracism increases susceptibility to conformity, compliance, and now, obedience. 相似文献
104.
Emiliano Santarnecchi Elisa Tatti Lucia Mencarelli Francesco Neri Davide Momi Giorgio Di Lorenzo Alvaro Pascual-Leone Simone Rossi Alessandro Rossi 《Cognitive, affective & behavioral neuroscience》2018,18(3):495-508
Coping abilities represent the individual set of mental and behavioral strategies adopted when facing stress or traumatic experiences. Coping styles related to avoidance have been linked to a disposition to develop psychiatric disorders such as PTSD, anxiety, and major depression, whereas problem-oriented coping skills have been positively correlated with well-being and high quality of life. Even though coping styles constitute an important determinant of resilience and can impact many aspects of everyday living, no study has investigated their brain functional connectivity underpinnings in humans. Here we analyzed both psychometric scores of coping and resting-state fMRI data from 102 healthy adult participants. Controlling for personality and problem-solving abilities, we identified significant links between the propensity to adopt different coping styles and the functional connectivity profiles of regions belonging to the default mode (DMN) and anterior salience (AS) networks—namely, the anterior cingulate cortex, left frontopolar cortex, and left angular gyrus. Also, a reduced negative correlation between AS and DMN nodes explained variability in one specific coping style, related to avoiding problems while focusing on the emotional component of the stressor at hand, instead of relying on cognitive resources. These results might be integrated with current neurophysiological models of resilience and individual responses to stress, in order to understand the propensity to develop clinical conditions (e.g., PTSD) and predict the outcomes of psychotherapeutic interventions. 相似文献
105.
Journal of Philosophical Logic - We present a revenge argument for non-reflexive theories of semantic notions – theories which restrict the rule of assumption, or (equivalently) initial... 相似文献
106.
Havewala Mazneen Lorenzo Nicole E. Seddio Kaylee Oddo Lauren E. Novick Danielle R. Fox Nathan A. Chronis-Tuscano Andrea 《Journal of abnormal child psychology》2022,50(7):853-866
Research on Child and Adolescent Psychopathology - Symptoms of ADHD and anxiety often co-occur, yet we are limited in our understanding of which children with ADHD symptoms are more likely to... 相似文献
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108.
The ability of parties to not only reflect, but actually shape, citizens' preferences on policy issues has been long debated, as it corresponds to a fundamental prediction of classic party identification theory. While most research draws on data from the United States or studies of low-salience issues, we exploit the unique opportunity presented by the 2013 Italian election, with the four major parties of a clear multiparty setting holding distinct positions on crucial issues of the campaign. Based on an experimental design, we test the impact of party cues on citizens' preferences on high-salience issues. The results are surprising: Despite a party system in flux (with relevant new parties) and a weakening of traditional party identities, we find large, significant partisan-cueing effects in all the three experimental issues, and for voters of all the major Italian parties—both old and new, governmental and opposition, ideologically clear or ambiguous. 相似文献
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