This study examines three human facial variables to assess facial attractiveness: symmetry, sex-typicality, and distinctiveness. The goal is to understand whether perceived facial attractiveness might explain human mate choice. The authors use Bayesian multilevel regression analyses and 72 standardized frontal facial landmarks to explore the structural aspects of opposite-sex facial attractiveness preferences for both females and males. They used a sample of 1,550 faces from 10 countries. The results show that 1) distinctiveness is negatively correlated with attractiveness, 2) symmetry does not have a significant association with attractiveness, and 3) sex-typicality is positively correlated with female facial attractiveness but not the other way around. The authors also used a model with body height and BMI, but only some cases had enough information. Although with limitations, their results show that a lower BMI is associated with higher perceived female attractiveness. There is no significant association between BMI and perceived male attractiveness.

This study examines three human facial variables to assess facial attractiveness: symmetry, sex-typicality, and distinctiveness. The goal is to understand whether perceived facial attractiveness might explain human mate choice. The authors use Bayesian multilevel regression analyses and 72 standardized frontal facial landmarks to explore the structural aspects of opposite-sex facial attractiveness preferences for both females and males. They used a sample of 1,550 faces from 10 countries. The results show that 1) distinctiveness is negatively correlated with attractiveness, 2) symmetry does not have a significant association with attractiveness, and 3) sex-typicality is positively correlated with female facial attractiveness but not the other way around. The authors also used a model with body height and BMI, but only some cases had enough information. Although with limitations, their results show that a lower BMI is associated with higher perceived female attractiveness. There is no significant association between BMI and perceived male attractiveness.

This study utilizes Bayesian statistics to test the associations between harsh environments (specifically those with higher degrees of climate variability and relatively lower average temperature and precipitation) and alloparental care in societies throughout the world. Results support the hypothesis that societies in harsher environments show higher rates of alloparental care and that societies with higher rates of starvation and resource stress exhibit lower rates of alloparental care. The authors explain this theorizing that in the former relative costs are sufficiently outweighed by the benefits of this type of cooperation and in the latter they are not. They conclude that their results support the plasticity of human alloparenting as a response to varying ecology.

This study utilizes Bayesian statistics to test the associations between harsh environments (specifically those with higher degrees of climate variability and relatively lower average temperature and precipitation) and alloparental care in societies throughout the world. Results support the hypothesis that societies in harsher environments show higher rates of alloparental care and that societies with higher rates of starvation and resource stress exhibit lower rates of alloparental care. The authors explain this theorizing that in the former relative costs are sufficiently outweighed by the benefits of this type of cooperation and in the latter they are not. They conclude that their results support the plasticity of human alloparenting as a response to varying ecology.

The "equi-complexity hypothesis" suggests that there is an equal complexity across languages, meaning that there are constant trade-offs between different domains. Using phylogenetic modelling in a sample of 244 languages, this study follows a diachronic perspective to explore if there is an inversed coevolution within the grammatical coding of nominal and verbal domains. The results show that while there appears to be a coevolutionary relationship between some features of these two domains, there is no evidence to support the idea that all languages maintain an overall equilibrium of grammatical complexity. Rather, the correlation nominal and verbal domains vary between lineages. Austronesian languages do not show a coevolution between the domains. Sino-Tibetan languages seem to have a positive correlation while Indo-European languages appear to have a negative correlation, meaning that this inverse coevolution can be lineage specific.

In this master's thesis, the author seeks to understand the determinants of attitudes on Intimate Partner Violence (IPV). She does this by correlating data on socioeconomic status, age, and education against survey data about IPV attitudes from Demographic and Health Surveys that were conducted in 56 countries across the world. Additionally, for purposes of analysis, she also ran correlations between attitudes and ancestral plow use data some the Ethnographic Atlas as a proxy for the presence of patriarchal norms. Finally, and most uniquely, the author conducted relational analyses between couples in order to gauge how IPV attitudes were influenced by the attitudes of a person's partner. The author concludes with suggestions of how this information can be used by policymakers in order to reduced and ultimately eliminate IPV.

In this master's thesis, the author seeks to understand the determinants of attitudes on Intimate Partner Violence (IPV). She does this by correlating data on socioeconomic status, age, and education against survey data about IPV attitudes from Demographic and Health Surveys that were conducted in 56 countries across the world. Additionally, for purposes of analysis, she also ran correlations between attitudes and ancestral plow use data some the Ethnographic Atlas as a proxy for the presence of patriarchal norms. Finally, and most uniquely, the author conducted relational analyses between couples in order to gauge how IPV attitudes were influenced by the attitudes of a person's partner. The author concludes with suggestions of how this information can be used by policymakers in order to reduced and ultimately eliminate IPV.

In this master's thesis, the author seeks to understand the determinants of attitudes on Intimate Partner Violence (IPV). She does this by correlating data on socioeconomic status, age, and education against survey data about IPV attitudes from Demographic and Health Surveys that were conducted in 56 countries across the world. Additionally, for purposes of analysis, she also ran correlations between attitudes and ancestral plow use data some the Ethnographic Atlas as a proxy for the presence of patriarchal norms. Finally, and most uniquely, the author conducted relational analyses between couples in order to gauge how IPV attitudes were influenced by the attitudes of a person's partner. The author concludes with suggestions of how this information can be used by policymakers in order to reduced and ultimately eliminate IPV.

In this master's thesis, the author seeks to understand the determinants of attitudes on Intimate Partner Violence (IPV). She does this by correlating data on socioeconomic status, age, and education against survey data about IPV attitudes from Demographic and Health Surveys that were conducted in 56 countries across the world. Additionally, for purposes of analysis, she also ran correlations between attitudes and ancestral plow use data some the Ethnographic Atlas as a proxy for the presence of patriarchal norms. Finally, and most uniquely, the author conducted relational analyses between couples in order to gauge how IPV attitudes were influenced by the attitudes of a person's partner. The author concludes with suggestions of how this information can be used by policymakers in order to reduced and ultimately eliminate IPV.

Authors investigate the prevalence of male homosexual preference (MHP) cross-culturally. They employ four models to test the link between level of social stratification and the probability of observing male homosexual preference (MHP). Authors believe that this link supports the hypergyny hypothesis, which proposes that increased social stratification allows for some sort of factor that improves functional female fertility, perhaps through marriage to men of higher social classes. This would thereby allow more access to resources and consequently the ability to support a greater number of more reproductively-successful offspring. Authors do not make a causal link, however; rather, social stratification may be associated with a yet-undetermined pleiotropic factor that is somehow positive despite its cost on functional male fertility.