Sean P. Prall
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View article: Common DNA sequence variation influences epigenetic aging in African populations
Common DNA sequence variation influences epigenetic aging in African populations Open
View article: No evidence for disassortative mating based on HLA in a small-scale, endogamous population
No evidence for disassortative mating based on HLA in a small-scale, endogamous population Open
Studies dating back several decades have suggested that humans prefer potential mates with dissimilar HLA genotypes. Evidence for actualized disassortative mating based on the human-specific MHC remains inconclusive. For instance, cosmopol…
View article: Erema po otjindjumba? Highlighting cultural models and knowledge gaps of malaria in rural Namibian pastoralists
Erema po otjindjumba? Highlighting cultural models and knowledge gaps of malaria in rural Namibian pastoralists Open
Background As Namibia attempts to eradicate locally transmitted cases of malaria, epidemiological strategies, interventions, and outreach require a sound understanding of indigenous knowledge and practice. Research describing local explana…
View article: “Better to die trying”: Vaccine perceptions and COVID-19 experiences in rural Namibian pastoralists
“Better to die trying”: Vaccine perceptions and COVID-19 experiences in rural Namibian pastoralists Open
Substantial research indicates that local explanatory models of disease shape heath behaviors. However, less is known regarding how cultural models of disease influence interpretations of vaccines. Vaccination decisions are based around a …
View article: Quantifiable Cross-cultural Research on Medical Mistrust is Necessary for Effective and Equitable Vaccination in Low- and Middle-income Countries
Quantifiable Cross-cultural Research on Medical Mistrust is Necessary for Effective and Equitable Vaccination in Low- and Middle-income Countries Open
Perceptions of healthcare personnel and institutions substantially impact healthcare behaviors. In the US, minority experiences with racist events like the Tuskegee study, alongside everyday experiences of marginalization and discriminatio…
View article: Common DNA sequence variation influences epigenetic aging in African populations
Common DNA sequence variation influences epigenetic aging in African populations Open
Aging is associated with genome-wide changes in DNA methylation in humans, facilitating the development of epigenetic age prediction models. However, most of these models have been trained primarily on European-ancestry individuals, and no…
View article: Medical mistrust, discrimination and healthcare experiences in a rural Namibian community
Medical mistrust, discrimination and healthcare experiences in a rural Namibian community Open
Substantial evidence indicates that medical mistrust, resulting from experiences with discrimination and marginalisation, is a determinant of health disparities in minority populations. However, this research is largely limited to the US a…
View article: Women’s subsistence strategies predict fertility across cultures, but context matters
Women’s subsistence strategies predict fertility across cultures, but context matters Open
While it is commonly assumed that farmers have higher, and foragers lower, fertility compared to populations practicing other forms of subsistence, robust supportive evidence is lacking. We tested whether subsistence activities—incorporati…
View article: Remote sensing evidence for population growth of isolated indigenous societies in Amazonia
Remote sensing evidence for population growth of isolated indigenous societies in Amazonia Open
Isolated indigenous societies who actively avoid sustained peaceful contact with the outside world are critically endangered. Last year, “Tanaru”, the lone surviving man of his tribe for at least 35 years, died in Southwest Amazonia, marki…
View article: Increased homozygosity due to endogamy results in fitness consequences in a human population
Increased homozygosity due to endogamy results in fitness consequences in a human population Open
Recessive alleles have been shown to directly affect both human Mendelian disease phenotypes and complex traits. Pedigree studies also suggest that consanguinity results in increased childhood mortality and adverse health phenotypes, presu…
View article: Remote sensing evidence for population growth of isolated indigenous societies in Amazonia
Remote sensing evidence for population growth of isolated indigenous societies in Amazonia Open
Isolated indigenous societies who actively avoid sustained peaceful contact with the outside world are critically endangered. Last year “Tanaru”, the lone surviving man of his tribe for at least 35 years, died in Southwest Amazonia marking…
View article: Examination of runs of homozygosity in relation to height in an endogamous Namibian population
Examination of runs of homozygosity in relation to height in an endogamous Namibian population Open
Objectives Height is a complex, highly heritable polygenic trait subject to both genetic composition and environmental influences. Recent studies suggest that a large proportion of height heritability is determined by the cumulative effect…
View article: Increased homozygosity due to endogamy results in fitness consequences in a human population
Increased homozygosity due to endogamy results in fitness consequences in a human population Open
Recessive alleles have been shown to directly affect both human Mendelian disease phenotypes and complex traits like height. Pedigree studies also suggest that consanguinity results in increased childhood mortality and adverse health pheno…
View article: The effect of mating market dynamics on partner preference and relationship quality among Himba pastoralists
The effect of mating market dynamics on partner preference and relationship quality among Himba pastoralists Open
Relative mate value has long been believed to be a critical component of mate choice in humans. However, most empirical work focuses on preferences rather than actual pair formation, and data connecting partner preferences, partnership for…
View article: Are fathers a good substitute for mothers? Paternal care and growth rates in Shodagor children
Are fathers a good substitute for mothers? Paternal care and growth rates in Shodagor children Open
Biparental care is a hallmark of human social organization, though paternal investment varies between and within societies. The facultative nature of paternal care in humans suggests males should invest when their care improves child survi…
View article: The Role of Spousal Separation on Norms Related to Gender and Sexuality among Himba Pastoralists
The Role of Spousal Separation on Norms Related to Gender and Sexuality among Himba Pastoralists Open
The gender-specific labor demands of arid pastoralism often lead to spousal separation. Men typically respond in one of two ways: engage in mate guarding tactics, or loosen restrictions on female sexuality. Among Himba pastoralists in nort…
View article: Navigating cross-cultural research: methodological and ethical considerations
Navigating cross-cultural research: methodological and ethical considerations Open
The intensifying pace of research based on cross-cultural studies in the social sciences necessitates a discussion of the unique challenges of multi-sited research. Given an increasing demand for social scientists to expand their data coll…
View article: Navigating cross-cultural research: methodological and ethical considerations
Navigating cross-cultural research: methodological and ethical considerations Open
The intensifying pace of research based on cross-cultural studies in the social sciences necessitates a discussion of the unique challenges of multi-sited research. Given an increasing demand for social scientists to expand their data coll…
View article: Why men invest in non-biological offspring: paternal care and paternity confidence among Himba pastoralists
Why men invest in non-biological offspring: paternal care and paternity confidence among Himba pastoralists Open
Paternal investment is predicted to be a facultative calculation based on expected fitness returns and modulated by a host of social predictors including paternity uncertainty. However, the direct role of paternity confidence on the patter…
View article: High rate of extrapair paternity in a human population demonstrates diversity in human reproductive strategies
High rate of extrapair paternity in a human population demonstrates diversity in human reproductive strategies Open
Himba have an extrapair paternity rate of 48% with both men and women highly accurate at detecting cases of EPP.
View article: Resource demands reduce partner discrimination in Himba women
Resource demands reduce partner discrimination in Himba women Open
View article: The ethics and logistics of field-based genetic paternity studies
The ethics and logistics of field-based genetic paternity studies Open
View article: Patterns of paternal investment predict cross-cultural variation in jealous response
Patterns of paternal investment predict cross-cultural variation in jealous response Open
View article: The disequilibrium of double descent: changing inheritance norms among Himba pastoralists
The disequilibrium of double descent: changing inheritance norms among Himba pastoralists Open
Matrilineal systems in sub-Saharan Africa tend to co-occur with horticulture and are rare among pastoralists, with the causal arrow pointing from the introduction of cattle to the loss of matriliny. However, most work on this topic stems f…
View article: Supplementary material from "The disequilbrium of double descent: changing inheritance norms among Himba pastoralists"
Supplementary material from "The disequilbrium of double descent: changing inheritance norms among Himba pastoralists" Open
Matrilineal systems in sub-Saharan Africa tend to co-occur with horticulture and are rare among pastoralists, with the causal arrow pointing from the introduction of cattle to the loss of matriliny. However, most work on this topic stems f…
View article: Double Descent Phil Trans
Double Descent Phil Trans Open
Raw data and supplementary materials
View article: The influence of age- and sex-specific labor demands on sleep in Namibian agropastoralists
The influence of age- and sex-specific labor demands on sleep in Namibian agropastoralists Open
View article: Short‐term resource allocation during extensive athletic competition
Short‐term resource allocation during extensive athletic competition Open
Objectives Following predictions from life history theory, we sought to identify acute trade‐offs between reproductive effort (as measured by psychological arousal) and somatic maintenance (via functional measures of innate immunity) durin…
View article: Dehydroepiandrosterone and multiple measures of functional immunity in young adults
Dehydroepiandrosterone and multiple measures of functional immunity in young adults Open
Objectives Human immune function is strongly influenced by variation in hormone concentrations. The adrenal androgens dehydroepiandrosterone (DHEA) and dehydroepiandrosterone‐sulfate (DHEA‐S) are thought to be beneficial to immune function…
View article: Male quality, dominance rank, and mating success in free-ranging rhesus macaques
Male quality, dominance rank, and mating success in free-ranging rhesus macaques Open
In social mammals, condition and health are important determinants of the ability of males to achieve high dominance rank. Measures of individual condition are also predicted to affect male fitness via female preference for high-quality ma…