Metric forensic anthropology decisions: Reliability and biasability of sectioning-point-based sex estimates

Subjective decisions make human cognitive processes more susceptible to bias and error. Specifically, research indicates that additional context biases forensic anthropologists’ morphological analyses. To address whether metric analyses are also subject to bias, we conducted a pilot study in which 52 experienced osteologists measured a difficult-to-classify human femur, with or without additional contextual information. Using a metric sectioning-point sex-estimation method, participants provided a sex estimate for individual skeletal element(s) and, when given multiple elements, the combined skeletal assemblage. Control group participants (n = 24) measured only the femur. In addition to the femur, bias group participants (n = 28) either measured a female humerus and viewed a female-biasing photograph (n = 14) or measured a male humerus and viewed a male-biasing photograph (n = 14). We explored whether the experts in the different groups would differ in: (1) femoral measurements; (2) femoral sex-estimation conclusions; and (3) final sex-estimation conclusions for the skeletal assemblage. Although the femoral measurements and femoral sex estimates were comparable across groups, the overall sex estimates in the female-biased group were impacted by contextual information—differing from both the control and male-biased groups (p < 0.001). Our results demonstrate that cognitive bias can occur even in metric sex-estimation conclusions. Specifically, this occurred when the metric data and single-element sex estimates were synthesized into an overall estimate. Thus, our results suggest that metric methods are most vulnerable to bias when data are synthesized into an overall conclusion, highlighting the need for bias countermeasures and comprehensive statistical frameworks for synthesizing metric data to mitigate the effects of cognitive bias.     

What do forensic analysts consider relevant to their decision making?

In response to research demonstrating that irrelevant contextual information can bias forensic science analyses, authorities have increasingly urged laboratories to limit analysts' access to irrelevant and potentially biasing information (Dror and Cole (2010) [3]; National Academy of Sciences (2009) [18]; President's Council of Advisors on Science and Technology (2016) [22]; UK Forensic Science Regulator (2015) [26]). However, a great challenge in implementing this reform is determining which information is task-relevant and which is task-irrelevant. In the current study, we surveyed 183 forensic analysts to examine what they consider relevant versus irrelevant in their forensic analyses. Results revealed that analysts generally do not regard information regarding the suspect or victim as essential to their analytic tasks. However, there was significant variability among analysts within and between disciplines. Findings suggest that forensic science disciplines need to agree on what they regard as task-relevant before context management procedures can be properly implemented. The lack of consensus about what is relevant information not only leaves room for biasing information, but also reveals foundational gaps in what analysts consider crucial in forensic decision making.     

Age Adjustment and Recall Bias in the Analysis of Domestic Violence Data: Methodological Improvements Through the Application of Survival Analysis Methods

This methodological paper presents the utility of survival analysis methods to provide age adjustment in the analysis of domestic violence data. These methods improve the estimation of lifetime probability of domestic violence, improve identification of patterns of first victimization over the lifespan, and provide methods of testing risk factors for first victimization while adjusting for the respondents' age. Most importantly, these methods allow a new investigation of recall bias. Results suggest that lifetime probability of abuse may have been substantially underestimated in previous studies because of problems in recall/disclosure encountered by middle-aged women.     

Violence,fear, and development in Latin America: a critical overview

This introduction presents the core concepts that shape this special issue on the impact of violence and the processes of development in Central and South America. The understanding of development is considered in terms broader than the economic context alone, in order to assess wider social and political aspects. With a similarly expansive scope, forms of violence are addressed that range from direct physical harm and bodily attack to the often more subtle aggression of racialised abuse or the pressures on community-centred production from dominant market forces. In these contexts, violence, economic initiatives, and political allegiances form unintended and often dangerous networks of consequence for development matters. All the articles in this volume exemplify further the spatial environments of violence and diverse ‘landscapes of fear’ that shape our existence and help to define our actions, territories, and understanding of what happens around us.     

Stammwähler und die opportunistische Wahl parteipolitischer Programme

This article explains political radicalism by the number of voters who are biased towards a party. With little voters biased in favor of a party, this party has to rely more heavily on its programmatic distance to other parties. Because large parties – i.e.: parties with a high number of biased voters – gain votes when they move to the center of the political spectrum, parties with a lower number of voters that are biased in their favor are forced to the edges of the policy space. We draw on a computational model of political competition between four parties in a two‐dimensional policy space to investigate this relationship. We use panel corrected OLS estimates to analyze the data generated by the computer simulation. Our results substantiate the hypothesis of a negative relationship between the number of biased voters and the inclination of a party to adopt a more extreme policy stance.     

城市化进程中的选择偏差与对策

二十一世纪是城市的世纪 ,也是我国城市化进程加快发展的世纪。著名经济学家斯蒂格利茨曾断言二十一世纪有两件大事将改变世界的面貌 :一是中国的城市化 ,一是美国的高科技。然而由于我国长期的计划经济体制和官本位等封建残余思想的影响 ,城市化的进程与历史的本来规律发生了一定的偏差。     

El Mercurio Lies,and La Tercera Lies More. Political Bias in Newspaper Headlines in Chile, 1994–2010

In this article we examine the presence of bias in Chile's two main daily newspapers, El Mercurio and La Tercera, both of which have historically been associated with the political right. We analyse their principal headlines in the first 100 days of rule of presidents Eduardo Frei (1994–2000), Ricardo Lagos (2000–2006), Michelle Bachelet (2006–2010) and Sebastián Piñera (2010–2014). We find that La Tercera was more critical of all these presidents than El Mercurio. In La Tercera we also identify an ideological bias in favour of Piñera as compared to the centre‐left presidents, and in El Mercurio a greater bias against Bachelet than the other presidents.     

Zombies,Gender, and Student Active Learning

Abstract

While the use of active learning exercises and the incorporation of popular culture in the classroom have increased in recent years, the study of potential gendered effects on learning and engagement when it comes to these practices has been limited. In this study, data are collected from international politics courses using a zombie outbreak as the theme for a United Nations simulation to explore whether there are unintentional gendered outcomes from these activities. Contrary to expectations of previous literature, no statistical differences manifest between men and women in enjoyment and learning when using zombie themes in active learning.     

Explaining the Reversed Gender Gap in Political Consumerism: Personality Traits as Significant Mediators

Research on political consumerism documents a persistent reversed gender gap, as women boycott and buycott products more often than men. Previous efforts to explain the reversed gender gap rely on classical theoretical models developed to illuminate gender differences in political participation in general. Accounting for socio‐economic and situational factors as well as socialization leaves a significant amount of the reversed gender gap unexplained, though. Adhering to recent empirical evidence of personality as an important factor influencing political behavior, we argue that gender differences in personality traits could provide an alternative explanation to account for gender disparities in political consumerism. We use original survey data specially designed to measure political consumerism in Switzerland, which also include the Big Five model of personality. We find empirical evidence that gender differences in personality traits, in particular agreeableness, explain a significant portion of the reversed gender gap in political consumerism.     

Cross-gender Violence Perpetration and Victimization Among Early Adolescents and Associations with Attitudes Toward Dating Conflict

This study examined gender differences in cross-gender violence perpetration and victimization (ranging from mild, e.g., push, to severe, e.g., assault with a knife or gun) and attitudes toward dating conflict, among an urban sample of 601 early adolescents (78% African-American). Comparisons across gender groups for cross-gender (e.g., female-to-male) violence perpetration and victimization indicated higher levels of perpetration for girls and higher levels of victimization for boys. Girls also reported higher levels of verbal and physical violence toward partners with regard to attitudes toward dating conflict. A path model was specified and indicated that cross-gender violence perpetration, harsh parenting, peer deviance, low family income, and neighborhood hazards accounted for significant variation in attitudes toward dating conflict. Findings were discussed regarding the need to identify developmental precursors of dating violence in early adolescence and to focus prevention efforts on components (e.g., social skills, coping strategies) necessary to prevent the onset and escalation of adolescent dating violence.