When the outcome is different than expected : subjective expectancy shapes reward prediction error at the FRN level

Converging evidence in human electrophysiology suggests that evaluative feedback provided during performance monitoring (PM) elicits two distinctive and successive ERP components: the feedback-related negativity (FRN) and the P3b. Whereas the FRN has previously been linked to reward prediction error (RPE), the P3b has been conceived as reflecting motivational or attentional processes following the early processing of the RPE, including action value updating. However, it remains unclear whether these two consecutive neurophysiological effects depend on the direction of the unexpectedness (better- or worse-than-expected outcomes; signed RPE) or instead only on the degree of unexpectedness irrespective of direction (i.e., unsigned RPE). To address this question, we devised an experiment in which we manipulated the objective reward probability and the subjective reward expectancy (via instructions) in a factorial within-subject design and explored amplitude changes of the FRN and the P3b. A 64-channel EEG was recorded while 32 participants performed a speeded go/no-go task in which evaluative feedback based on the reward probability either violated expectancy (thereby creating a RPE) or did not. This violation corresponded either to better- or worse-than-expected events. Results showed that the FRN was larger when RPE occurred than when it did not, but irrespective of the direction of this violation. Interestingly, in these two conditions, action value was updated for the positive feedback selectively, as shown by the P3b amplitude. These results obey a two-stage model of PM assuming that unsigned RPE is first rapidly detected (FRN level) before the positive feedback's value is updated selectively (P3b effect)

Le patrimoine culturel immatériel sur la Toile. Comparaison entre réseaux nationaux

en publication sur "Culture et recherche", n. 125National audienceLa Convention de l'Unesco (2003) pour la sauvegarde du patrimoine culturel immatériel (PCI) est explicitement adressée aux États et leur attribue plusieurs tâches. Sans doute, pourtant, aucun État ne pourrait accomplir toutes ces tâches sans l'assistance d'un vaste réseau d'institutions, d'associations, de professionnels et de particuliers. Les nouvelles pratiques de sauvegarde du patrimoine immatériel, mises en place par l'État, croisent, imbriquent et souvent transforment les routines existantes en modifiant les relations entre les acteurs. Les réseaux d'acteurs, construits ou reconstruits dans chaque État en raison de la Convention offrent un objet de recherche très prometteur puisqu'ils reflètent l'approche nationale dans la gestion du PCI. Cet article vise à comparer trois réseaux nationaux (France, Italie, Suisse) impliqués dans la mise en œuvre de la Convention, afin de mettre en évidence les particularités majeures de chaque pays

Tratado da responsabilidade pública

Divulgação dos SUMÁRIOS das obras recentemente incorporadas ao acervo da Biblioteca Ministro Oscar Saraiva do STJ. Em respeito à lei de Direitos Autorais, não disponibilizamos a obra na íntegra. STJ00081620 35:347.51 S498

Architecture at the service of care: France-USA Memorial Hospital of Saint-Lô

The France-USA Memorial Hospital in Saint-Lô, Normandy (1948-1965), is known as one of the most relevant French Reconstruction projects. It is the first important work crafted by the French-American architect, Paul Nelson (1895-1979). His humanist approach inspired a series of unprecedented, meaningful and technical architectural innovations. The organization of the new hospital, based on functionality and modernity; polychromic and artistic inclusion; extended high-quality work, notably the "claustra" façade; ovoid surgical rooms and technical equipment are testimonies to the major quality and innovation pursued in the Memorial Hospital project. Paul Nelson’s work brings into focus the rich and comprehensive relationship between architecture, arts and care

Study of the Influence of Helical Milling Parameters on the Quality of Holes in the UNS R56400 Alloy

Helical milling has been positioned as an alternative to conventional drilling, where the advantages it offers make it very attractive for use on difficult-to-machine alloys such as the titanium alloy UNS R56400. However, the correlation between the indicator of hole quality and the kinematic parameters has rarely been studied. The kinematics are what bring most advantages and that is why it is necessary to know their influence. In this aspect, there are different focuses of problems associated with the complexity of the process kinematics, which makes it necessary to undertake a deeper analysis of the process and to carry out a preliminary study. To address this problem, a DOE (Design of Experiments) is proposed to identify the sensitivity and the main trends of the properties that define the quality holes with respect to the kinematic parameters. At the same time, a nomenclature is proposed to unify and avoid misinterpretations. This study has allowed us to obtain conclusive results that offer very relevant information for future researc

Sharp phase transition for Gaussian percolation in all dimensions

We consider the level-sets of continuous Gaussian fields on $\mathbb{R}^d$ above a certain level $-\ell\in \mathbb{R}$, which defines a percolation model as $\ell$ varies. We assume that the covariance kernel satisfies certain regularity, symmetry and positivity conditions as well as a polynomial decay with exponent greater than $d$ (in particular, this includes the Bargmann-Fock field). Under these assumptions, we prove that the model undergoes a sharp phase transition around its critical point $\ell_c$. More precisely, we show that connection probabilities decay exponentially for $\ell<\ell_c$ and percolation occurs in sufficiently thick 2D slabs for $\ell>\ell_c$. This extends results recently obtained in dimension $d=2$ to arbitrary dimensions through completely different techniques. The result follows from a global comparison with a truncated (i.e. with finite range of dependence) and discretized (i.e. defined on the lattice $\varepsilon\mathbb{Z}^d$) version of the model, which may be of independent interest. The proof of this comparison relies on an interpolation scheme that integrates out the long-range and infinitesimal correlations of the model while compensating them with a slight change in the parameter $\ell$.Comment: 19 page