Three-dimensional computer-assisted craniometrics: a comparison of the uncertainty in measurement induced by surface reconstruction performed by two computer programs

Digital investigation of anthropological material through computed tomography (CT) offers several new opportunities in morphometrics. However, an object measured with computer-assisted methods does not necessarily exactly match the original one. The scanning and surface reconstruction of the object induce some alterations, and data acquisition is prone to measurement uncertainty. The purpose of this research is to evaluate the intra- and inter-observers variations in medical CT scan measurements of a known-size phantom and two dry crania. Two software packages, AMIRA and Treatment and Increased Vision for Medical Imaging (TIVMI), which use different techniques of surface reconstructions, were compared. The mean difference between the measurements was lower for TIVMI, using an objective algorithm based on the half-maximum height (HMH) protocol in three dimensions (3D). AMIRA can induce up to a 4% error in known measurements and 5% uncertainty in dry skull measurements. This study emphasises the risk of object shape alteration in each step of its digitisation.     

Assessing Psychopathic Traits and Criminal Behavior in a Young Adult Female Community Sample Using the Self‐Report Psychopathy Scale

This study assessed psychopathic traits in a nonforensic female population (N = 343). Respondents completed the Self‐Report Psychopathy Scale‐4: Short Form (SRP‐SF) and also reported on their Criminal Behavior. The results revealed relatively higher scale elevations for the Interpersonal and Lifestyle SRP‐SF facets, compared to the Affective and Antisocial facets. Also, those with a history of Criminal Behavior had significantly higher SRP‐SF facet scores on all four psychopathy domains, compared to those without such history. Consistent with a number of previous studies, the structural equation modeling results revealed good fit for the four‐factor SRP‐SF model. In addition, a super‐ordinate SRP‐SF factor, which accounted for the majority variance of all four SRP‐SF first‐order factors, also accounted for 50% of the variance in a latent Criminal Behavior factor. Taken together, findings support use of the SRP‐SF to assess psychopathic features in a moderately large sample of Belgium women.     

Incumbents' Interests and Gender Quotas

The introduction of mandatory gender quotas in party lists is a reform that many countries have recently adopted or have been considering. The electoral system affects the incumbents' incentives to make such reforms, their details, and their effectiveness. We show that male incumbents can actually expect an increased incumbency advantage when gender quotas are introduced, if they are elected through single‐member district majority rule. On the other hand, no expectation of male advantage can reduce the incumbents' fear of being replaced if they are elected through closed‐list proportional representation. As France has both electoral systems, we validate the above argument using a formal model of constitutional design as well as an empirical analysis of the legislative elections in France, displaying the existence of male bias in the last three elections. We also show that parity may have Assembly composition effects and policy effects that vary with the electoral system.     

Crises and critical junctures in authoritarian regimes: addressing uprisings’ temporalities and discontinuities

Abstract

In this article, we aim at sharpening common understandings of the notion of political crisis to better explain the trajectories of authoritarian transformations during popular uprisings. We make three major claims. First, we propose a definition of crisis as brief moments of institutional fluidity and openness in which a process can take different directions. We delineate the crisis concept from the concept of critical junctures and outline how our approach contributes to the methodological debate on ‘near misses’. Second, we indicate how the de-institutionalisation processes leading up to a crisis are to be analytically distinguished from within-crisis moments. We argue in favour of a discontinuity approach that takes into account the different temporalities of gradual lead-up processes and rapid within-crisis dynamics. Finally, we illustrate our theoretical and analytical reasoning with concrete cases from the authoritarian crises of the Arab uprisings, whilst suggesting that our argument can travel to other areas of research in which crisis narratives have gained prominence.     

Trends in the Perpetration of Physical Aggression among Norwegian Adolescents 2007–2015

Most research on trends in physical aggression has shown declining levels among adolescents during the past two decades. However, few studies have attempted to explain such time trends. Based on two representative cross-sectional surveys of students in the final year of high school in 2007 (N?=?6631; 58.8% girls) and 2015 (N?=?4145; 60.3% girls), this study reports a substantial decline in physical aggression among Norwegian adolescents. Moreover, mediation analyses show that declining levels in problematic alcohol use and family violence during the same period are plausible explanations for some of this reduction. The results are discussed in light of contemporary changes in socialization of adolescents, and implications for violence prevention are presented.