Pitfalls of Computed Tomography 3D Reconstruction Models in Cranial Nonmetric Analysis*

Many studies in the literature have highlighted the utility of virtual 3D databanks as a substitute for real skeletal collections and the important application of radiological records in personal identification. However, none have investigated the accuracy of virtual material compared to skeletal remains in nonmetric variant analysis using 3D models. The present study investigates the accuracy of 20 computed tomography (CT) 3D reconstruction models compared to the real crania, focusing on the quality of the reproduction of the real crania and the possibility to detect 29 dental/cranial morphological variations in 3D images. An interobserver analysis was performed to evaluate trait identification, number, position, and shape. Results demonstrate a false bone loss in 3D models in some cranial regions, specifically the maxillary and occipital bones in 85% and 20% of the samples. Additional analyses revealed several difficulties in the detection of cranial nonmetric traits in 3D models, resulting in incorrect identification in circa 70% of the traits. In particular, pitfalls included the detection of erroneous position, error in presence/absence rates, in number, and in shape. The lowest percentages of correct evaluations were found in traits localized in the lateral side of the cranium and for the infraorbital suture, mastoid foramen, and crenulation. The present study highlights important pitfalls in CT scan when compared with the real crania for nonmetric analysis. This may have crucial consequences in cases where 3D databanks are used as a source of reference population data for nonmetric traits and pathologies and during bone-CT comparisons for identification purposes.     

Buyer and Seller Differences in Business‐to‐Business Negotiations

The purpose of this article is twofold: first, to examine the differences between buyers' and sellers' use of negotiation tactics in face‐to‐face business‐to‐business (B2B) negotiations and second, to explore how negotiators' professed negotiation styles influence buyers' and sellers' use of tactics. The methodology is a multiple case study analysis of eighteen negotiators representing twelve companies in six real‐life buyer–seller negotiations in B2B settings analyzed using qualitative research methods, including both comparative analysis and frequency analysis. We found some difference between buyers' and sellers' use of negotiation tactics, which suggests this question deserves further empirical study. Buyers' and sellers' use of specific tactics differs according to which overall strategy the negotiators chose, and sellers generally use a greater number of negotiation tactics than buyers. The findings challenge previous findings that suggest that B2B negotiations are collaborative and that negotiators communicate in a collaborative manner. The findings also increase our understanding of buyers' and sellers' variable use of tactics in the course of everyday practice as well as the interplay between negotiation tactics and strategies.     

Correction to: Age Patterns in Risk Taking Across the World

Journal of Youth and Adolescence - In the original publication, the legends for Figs 4 and 5 were incorrect, such that each regression line was mislabeled with the incorrect country. Below are the...     

Do the illegal and legal rents of politicians affect municipal election outcomes? Empirical evidence

This paper aims to analyse whether illegal (corruption) and legal rent extraction (high politicians’ wages) affect electoral outcomes at municipal level. We use an initial sample of 145 Spanish municipalities over 50,000 for two electoral periods: 2004–2007 (before the crisis) and 2008–2011 (during the crisis). Our findings show that neither illegal nor legal rent extraction impact on re-election in non-crisis times. However, we observe that citizens penalize legal rent extraction in the ballots during the crisis. Regarding the economic performance of the local governments, we find that its effect on re-election is important in non-crisis period. Nevertheless, in time of crisis, given that the economic situation is bad in general in the country, voters pay less attention to economic factors and focus on politicians’ behaviour.     

Evaluating local government performance in times of crisis

In recent years, Spanish local governments have come under increasing pressure to accommodate severe economic restrictions while maintaining their provision of local public services. We analyse overall cost efficiency in Spanish local governments during the period of the economic crisis (2008–2013), under four different non-parametric methodologies. Moreover, given how problematic it is to precisely define what municipalities do, we compare three different output models with various measures of quantity as well as quality. Results suggest that Spanish local government efficiency improved over the period 2008–2013 since budget expenditures (inputs) fell while local public services and facilities (outputs) were maintained. We also find evidence of the possible implications of service quality when measuring municipalities’ efficiency, and of structural differences in the average efficiency between municipalities located in different Spanish regions. Finally, our results confirm that the level and variation of efficiency scores are affected by the approach taken.     

Gender and developmental differences in adolescents' conceptions of moral reasoning

Eighth graders, 11th graders, and college sophomores wrote open-ended essays that characterized their own approaches to moral reasoning. Their essays were scored for the presence of various themes. Students also responded to three dilemmas from the Defining Issues Test (Rest, 1979). Students then rated their own use of justice and care orientations in moral reasoning, using a previously developed instrument (Ford and Lowery, 1986; Lyons, 1983). Characterizations of moral reasoning became more multifaceted and thorough with grade, and correlated with many traditional measures of moral reasoning. Males and females showed some, but relatively few, differences in characterizing their own moral reasoning, although females tended to respond more thoroughly to the open-ended task. Gender differences, when they occurred, were mostly found on measures that assessed so-called feminine issues or concerns, but not on traditional measures of moral reasoning. Characterizations of moral reasoning clustered into five dimensions, raising questions about the utility of the constructs of justice and care orientations.The first and third authors received financial support from a Ford-Mellon grant made to Carleton College. Results of this study were presented at the 1990 meeting of the Society for Research in Adolescence.Received Ph.D. in Psychology and M.S.E. in Computer and Information Sciences at the University of Pennsylvania, and has research interests in the development of reasoning skills, decision making, and conceptual development.Received Ph.D. in Counseling and Guidance from the University of Wisconsin, Madison, and has research interests in adolescent development and adolescent psychopathology.Received B.A. in Psychology from Carleton College in 1990. Has interests in adolescence and chemical dependence.     

Gender differences associated with young people's emotional reactions to sexual intercourse

The differences between male and female adolescents' emotional reactions to their most recent occasion of sexual intercourse were examined. The sample included 932 sexually active Australian secondary school students who completed a self-report questionnaire concerning their sexual behavior. The majority of young people reported that they felt happy or good following their most recent occasion of sex. Females were more likely than males to report negative emotions such as feeling bad and used, but there was no difference between the percentage of males and the percentage of females who reported feeling guilty. Girls were more likely to feel bad, used, or guilty last time if they were drunk/high or had sex with someone who was not a steady partner. Boys who had sex with someone other than a steady partner last time were more likely to feel guilty. Peer and parental influences were also associated with feelings of guilt. Girls who were more confident that they could talk to one of their parents/guardians about sex, and boys who believed that most of their peers were sexually active, were less likely to have felt guilty.Received B.A. (Hons) from University of Queensland. Research interests include adolescents mental and sexual health.Received B.A.(Hons) from University of Queensland. Interested in the areas of sex roles and sexual behavior among adolescents.Received Ph.D. from Murdoch University. Research interests include population studies of sexual behavior and mental health.Received M.B.B.S., M.D. from University of Sydney. Research interests include adolescent health, psychological response in disasters, coping with grief and loss and living with HIV/AIDS.     

Does Sex Matter to Democracy?

In order to isolate, theoretically, the vital mechanisms that constrain women as citizens in Western, democratic societies, it is necessary to go beyond explanations in terms of work, into sexuality However, it is not the practice of sexual coercion which, though a serious wrong, is fundamental in subordinating women in the formally free society; it is rather the freely given—and taken—love. Furthermore, if scrutinizing pre-democratic, anti-feminist arguments can help to reveal the situation today, it is the utilitarian view of women's sexual resources, rather than arguments about sexually differentiated—and inferior female— nature , which is crucial. Secondly, the concept of 'difference', now so popular among feminist writers, is important, especially when used empirically to avoid oversimplifying unity thinking about each of the sex/gender groups. But it is not tit for conceiving the power transactions going on in the socio-sexual process Furthermore. I suppose that one of the most important tasks of feminism is to balance the weights of (different) individuality and collectivity to mutually developmental values. Thirdly, women want more than 'equal chances', something other than 'equal results', and the 'different but equally valuable' must, to be women-worthy, be defined by women themselves. In a democratic society, if women are to be full and equal members, as leaders and led, then women and men have to be openly accepted as two fundamental, interested parties in society Finally, women should not claim this citizen status first and foremost as mothers, but simply as women. i e. as female, social 'incarnate subjects'.