Minimal p-morphic Images, Axiomatizations and Coverings in the Modal Logic K4

We define the concepts of minimal p-morphic image and basic p-morphism for transitive Kripke frames. These concepts are used to determine effectively the least number of variables necessary to axiomatize a tabular extension of K4, and to describe the covers and co-covers of such a logic in the lattice of the extensions of K4.     

Social anxiety mediates the effect of autism spectrum disorder characteristics on hostility in young adults

Problems with social anxiety are frequently reported in people with autism spectrum disorders (ASD). It is possible that social anxiety, when present, exacerbates the experience of hostility and other forms of aggression in relation to ASD symptoms. This study sought to determine if social anxiety symptoms mediate the relationship between features of ASD and feelings of hostility in young adults. Self-report measures of social anxiety, ASD, and facets of aggression were collected in a non-clinical sample (n = 618) of college students. Social anxiety was found to partially mediate the relationship between ASD features and self-reported hostility. There was also evidence for inconsistent mediation, such that social anxiety dampened the strength of the relationship between ASD symptoms and verbal and physical aggression. Findings highlight the potential influence of associated psychiatric symptoms in people with ASD. In addition, dimensional conceptualization of ASD symptoms, as opposed to a categorical approach solely, may be a useful approach to studying complex personality processes.     

Exploring the role of primary and supplementary motor areas in simple motor tasks with fNIRS

Studies employing functional magnetic resonance imaging (fMRI) have highlighted a covariation between the amplitude of hemodynamic responses recorded in primary and supplementary motor areas (M1 and SMA) and the duration of a motor task. A subset of these studies have hinted to a possible functional dissociation between processing carried out in these areas, with SMA primarily involved in action preparation, while M1 involved in action execution. This proposed functional dissociation was explored in the present study using a different technique—functional near-infrared spectroscopy—which enabled a finer-grained monitoring of the temporal characteristics of the hemodynamic response compared to fMRI. Here, hemodynamic responses in M1 and SMA were recorded in 7 participants during a right-finger-tapping task of short (1 s) or long (3 s) duration. Hemodynamic responses of larger amplitude were recorded from both contralateral M1 and SMA during long-duration than short-duration tapping. Furthermore, the analysis of the temporal profiles of these responses revealed a more sustained and prolonged activity for long-duration versus short-duration tapping in M1, but not in SMA. Rather than functionally dissociable areas, the present results are more compatible with the hypothesis that M1 and SMA subserve different, though strongly interacting, functional subroutines subtended in motor task preparation and execution.     

Sets of probability distributions, independence, and convexity

This paper analyzes concepts of independence and assumptions of convexity in the theory of sets of probability distributions. The starting point is Kyburg and Pittarelli??s discussion of ??convex Bayesianism?? (in particular their proposals concerning E-admissibility, independence, and convexity). The paper offers an organized review of the literature on independence for sets of probability distributions; new results on graphoid properties and on the justification of ??strong independence?? (using exchangeability) are presented. Finally, the connection between Kyburg and Pittarelli??s results and recent developments on the axiomatization of non-binary preferences, and its impact on ??complete?? independence, are described.     

An inhibition effect in the temporal constrains of attentional selection: the Backward Blink

The study aims at investigating the dynamics of visual information processing during sequential control of attentional selection. By combining two different traditional paradigms we show for the first time that during rapid selection of visual targets, encoding of a new target stimulus is facilitated by suppression of the preceding relevant stimulus category (Backward Blink; BB). Such inhibition would operate to reduce interference from previously stored information, in order to facilitate the instantiation of a new attentional episode. Results suggest that the same underlying inhibitory mechanism might contribute to two different attentional effects, specifically, the switch cost and the Attentional Blink, suggesting a general inhibitory mechanism of attentional control, with broad implications for understanding how the brain perceives any task-relevant stimulus.     

Enhancing masculinity by slandering homosexuals: the role of homophobic epithets in heterosexual gender identity

The current studies investigate the effects of homophobic labels on the self-perception of heterosexual males, hypothesizing that when exposed to homophobic epithets, they are motivated to underline their masculinity and claim a distinctly heterosexual identity by taking distance from homosexuals and, to a lesser degree, from women. Heterosexual male participants were subliminally (Study 1) and supraliminally (Study 2) primed either by a homophobic epithet or by a category label, and completed the Traditional Beliefs About Gender and Gender Identity scale. Participants stressed their heterosexual identity, but not their gender distinctiveness, when exposed to homophobic epithets, compared to category labels. Study 2 demonstrated that the relation between the homophobic label and the participants' heterosexual identity was mediated by how negatively they reacted to the antigay label. Heterosexual identity was enhanced in reaction to homophobic labels but not to an equally derogatory label referring to regional identity. Results are discussed within an intergroup framework.     

The role of threat,emotions, and prejudice in promoting collective action against immigrant groups

In two studies we assessed the role of distinctiveness threat, group‐based emotions (angst, fear, and anger), and prejudice on people's willingness to engage in collective action against immigrant groups. In Study 1 (N = 222) White British participants were either informed that in the next 40 years the proportion of immigrants in the UK is unlikely to change (control condition) or that there will be more immigrants than White British people living in Britain (threat condition). We obtained support for a sequential multiple mediator model in which threat predicted British people's willingness to engage in collective action via the emotions first and then prejudice. This finding was replicated in Study 2 with an Italian sample (N = 283). These results enhance understanding of when and why advantaged groups undertake collective action against disadvantaged groups by demonstrating that distinctiveness threats and emotions promote such actions.     

Career Counselling: The Usefulness of the Career Interest Profile (CIP)

This study reports the findings from exploratory career counselling with Italian undergraduate university students using the Career Interest Profile (CIP). The participants (n = 178, females = 51.69%; mean age 22.28, SD = 1.59 years) received elective career counselling on campus. The students completed the CIP and the Self-Directed Search (SDS). Data were analyzed using both qualitative and quantitative approaches. The CIP yielded satisfactory results with regard to trustworthiness and intercorrelations with the SDS and provides career counsellors with a useful instrument for the identification of interest profiles of Italian undergraduate university students. Participants reported being enabled to explore prospective career interest areas using career-story narratives for constructing life trajectories and enhanced development of their career stories.