The Relation Between Participatory Social Practices and Social Representations of Citizenship in Young Adulthood

The concept of citizenship is used both as a synonym of social action when referencing to an active form of citizenship as well as to indicate a form of civic obligation (formal citizenship). According to these premises, citizenship can be formalized in a large number of activities that contribute to building it in different ways. The aim of the present work is to explore how the concepts of citizenship and being a citizen are co-built by Italian young adults. Two groups of young adults are considered (engaged vs. not engaged). Eighty-nine young adults participants aged 18–36 completed a self-administered mixed-method questionnaire. A content and thematic analysis was conducted and a composite representation of citizenship emerged. Results of the present work can clarify the concept of citizenship by exploring how it is cognitively and socially represented in young adults and how this representation changes in engaged and not engaged young adults.     

A new heteroskedasticity-consistent covariance matrix estimator for the linear regression model

The assumption that all random errors in the linear regression model share the same variance (homoskedasticity) is often violated in practice. The ordinary least squares estimator of the vector of regression parameters remains unbiased, consistent and asymptotically normal under unequal error variances. Many practitioners then choose to base their inferences on such an estimator. The usual practice is to couple it with an asymptotically valid estimation of its covariance matrix, and then carry out hypothesis tests that are valid under heteroskedasticity of unknown form. We use numerical integration methods to compute the exact null distributions of some quasi-t test statistics, and propose a new covariance matrix estimator. The numerical results favor testing inference based on the estimator we propose.     

Testing lumpability for marginal discrete hidden Markov models

When some states of a Markov chain are aggregated (or lumped) and the new process, with lumped states, inherits the Markov property, the original chain is said to be lumpable. We discuss the notion of lumpability for discrete hidden Markov models (DHMMs) and we explain why, in general, testing this hypothesis leads to non-standard problems. Nevertheless, we present a case where lumpability in DHMMs is a regular problem of comparing nested models. Finally, some simulation results assessing the performance of the proposed test and an application to two real data sets are given.     

Cognition and Behavior in Normal‐Form Games: An Experimental Study

This paper reports experiments designed to study strategic sophistication, the extent to which behavior in games reflects attempts to predict others’ decisions, taking their incentives into account. We study subjects’ initial responses to normal‐form games with various patterns of iterated dominance and unique pure‐strategy equilibria without dominance, using a computer interface that allowed them to search for hidden payoff information, while recording their searches. Monitoring subjects’ information searches along with their decisions allows us to better understand how their decisions are determined, and subjects’ deviations from the search patterns suggested by equilibrium analysis help to predict their deviations from equilibrium decisions.     

循证医学与医学教育

循证医学的产生、发展掀起了临床医学模式的巨大变革 ,也同样给传统的医学教育体系提出了严峻的挑战。本文初步探讨了医学教育怎样引进循证医学问题     

On the max-semistable limit of maxima of stationary sequences with missing values

Let {_Xn}$\{X_n\}$ be a stationary sequence with marginal distribution in the domain of attraction of a max-semistable distribution. This includes all distributions in the domain of attraction of any max-stable distribution and also other distributions like some integer-valued distributions with exponential type tails such as the Negative Binomial case. We consider the effect of missing values on the distribution of the maximum term. The pattern of occurrence of the missing values must be either iid or strongly mixing. We obtain the expression of the extremal index for the resulting sequence.     

Training educators in anti-racism and pluriculturalismo: recent experiences from Brazil

This article examines educator participation in training initiatives based on Brazilian federal education legislation (Law 10,639 from 2003) in one city in the state of São Paulo. Law 10,639/03 represents a significant moment in the institutionalization of ethno-racial policies in Brazil over the past 15 years. It makes obligatory the teaching of African and Black Brazilian history and culture in all school subjects, and requires in-depth study of black contributions in the social, economic, and political spheres. The article first contextualizes understandings of race and racism in Brazil, followed by an elaboration of the political and epistemological underpinnings of ethno-racial educational reforms focused on Afro-descendants. The article then analyzes the contradictory processes that emerge from teacher training initiatives where the perspectives of anti-racism, multiculturalism (pluriculturalismo), racial democracy, and miscegenation intermingle and get reconfigured into understandings that have the potential to advance as well as impede critical engagement with racism and racial inequality. Rather than view teacher training initiatives as default decolonization or inevitable co-optation, this article outlines a more complex and contradictory account of state-society collaborations on educational initiatives. The article reveals the practical challenges of decolonization to argue that anti-racist activism in the educational sphere must take seriously the variable and contingent results of such political efforts in order to meet teachers where they are at while also challenging them to go beyond these limitations.     

Predicting Human Papillomavirus Vaccine Intentions of College-Aged Males: An Examination of Parents' and Son's Perceptions

Abstract Objective: To examine male students' and their parents' human papillomavirus (HPV) vaccine communication in relation to males' willingness to discuss the vaccine with their health care provider and the likelihood of being vaccinated. Participants: Dyads (n = 111) of students and parents. Methods: Participants completed a HPV vaccine survey based on the risk perception attitude framework in 2009. Results: Male students' perceived susceptibility for HPV and self-efficacy to talk to their provider were directly related to their intention to discuss the HPV vaccine, and their intention was directly related to their likelihood of being vaccinated. Parents' perceived self-efficacy to talk to their son and response efficacy of the vaccine were directly related to their intention to talk to their son; however, parents' intention was not related to the likelihood of their son being vaccinated. Conclusions: College males may benefit from HPV vaccine educational programs that include communication skills training to discuss the HPV vaccine with their parents.