Association of Black Women's Perceptions of the Sex Ratio to Their Attitudes Toward and Experiences of Intimate Partner Violence

Sex ratios and gender norms: why both are needed to understand sexual conflict in humans

Sexual conflict theory has been successfully applied to predict how in non-human animal populations, sex ratios can lead to conflicting reproductive interests of females and males and affect their bargaining positions in resolving such conflicts of interests. Recently this theory has been extended to understand the resolution of sexual conflict in humans, but with mixed success. We argue that an underappreciation of the complex relationship between gender norms and sex ratios has hampered a successful understanding of sexual conflict in humans. In this paper, we review and expand upon existing theory to increase its applicability to humans, where gender norms regulate sex ratio effects on sexual conflict. Gender norms constrain who is on the marriage market and how they are valued, and may affect reproductive decision-making power. Gender norms can also directly affect sex ratios, and we hypothesize that they structure how individuals respond to market value gained or lost through biased sex ratios. Importantly, gender norms are in part a product of women's and men's sometimes conflicting reproductive interests, but these norms are also subject to other evolutionary processes. An integration of sexual conflict theory and cultural evolutionary theory is required to allow for a full understanding of sexual conflict in humans.

Unmarried Black Women's Sexual Socialization: The Role of Dating, Motherhood, and Intimate Partner Violence Across Media Types

The terms single and singlehood conflate marital (e.g. divorced, widowed, and never married) and relationship (e.g. partnered or not) statuses, complicating researchers’ understandings of their unique impact on women’s lives. Despite qualitative research demonstrating unmarried and unpartnered statuses have distinct implications for women’s sexual socialization, little quantitative research has explored these differences. To address this gap, the current project surveyed 506 unmarried Black women (M_age = 33.02) to explore how common singlehood experiences (dating, motherhood, and intimate partner violence [IPV]) moderated associations between respondents’ media use (television, social media, movies, and magazines) and relationship beliefs. This project focused on Black women because of their high rates of unmarried status and the pervasiveness of media stereotypes of their singlehood. Hierarchical linear regressions and the PROCESS model were used to test two-way interactions of media and singlehood experiences. Ecological systems and cultivation theories guided analyses. Across the dependent variables, media types were differentially associated with measures of relationship beliefs and these associations were differentially moderated by singlehood experiences. Weekly television was the most consistent predictor of relationship beliefs and experience with IPV was the most consistent moderator of associations. Women without partners, children, or experiences of IPV exhibited significant associations between media and relationship beliefs while their more experienced peers did not, suggesting singlehood experiences and media work together to shape unmarried Black women’s sexual socialization, though more work is needed to determine how. Results illuminated key differences between groups of unmarried Black women, complicating current understandings of single status and challenging how singlehood is conceptualized in sexual socialization research.

Homicide rates are spatially associated with built environment and socio-economic factors: a study in the neighbourhoods of Toronto, Canada

Objectives

Homicide rate is associated with a large variety of factors and therefore unevenly distributed over time and space. This study aims to explore homicide patterns and their spatial associations with different socioeconomic and built-environment conditions in 140 neighbourhoods of the city of Toronto, Canada.

Methods

A homicide dataset covering the years 2012 to 2021 and neighbourhood-based indicators were analysed using spatial techniques such as Kernel Density Estimation, Global/Local Moran’s I and Kulldorff’s SatScan spatio-temporal methodology. Geographically weighted regression (GWR) and multi-scale GWR (MGWR) were used to analyse the spatially varying correlations between the homicide rate and independent variables. The latter was particularly suitable for manifested spatial variations between explanatory variables and the homicide rate and it also identified spatial non-stationarities in this connection.

Results

The adjusted R² of the MGWR was 0.53, representing a 4.35 and 3.74% increase from that in the linear regression and GWR models, respectively. Spatial and spatio-temporal high-risk areas were found to be significantly clustered in downtown and the north-western parts of the city. Some variables (e.g., the population density, material deprivation, the density of commercial establishments and the density of large buildings) were significantly associated with the homicide rate in different spatial ways.

Conclusion

The findings of this study showed that homicide rates were clustered over time and space in certain areas of the city. Socioeconomic and the built environment characteristics of some neighbourhoods were found to be associated with high homicide rates but these factors were different for each neighbourhood.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12889-022-13807-4.