Documents
- Correlates and consequences of stress in infancyLandauer, Thomas K. - Handbook of Cross-Cultural Human Development, 1981 - 3 Hypotheses
This study is a continuation of previous research on the relationship between stress during infancy and adult height. With a better understanding of the stressors that infants experience and their effects, the authors test whether the relationship between stress and adult height remains significant when accounting for other environmental factors that may influence adult height. Results suggest that the relationship between infant stress and adult height does remain significant. Findings also show a relationship between infant stress and age at menarche.
Related Documents Cite More By Author - Height and sexual dimorphism of stature among human societiesGray, J. Patrick - American Journal of Physical Anthropology, 1980 - 6 Hypotheses
This article explores the relationship between sexual dimorphism of stature and variables of marriage, diet, subsistence and environment. Significant associations were found between security and plentifulness of food supply, protein availability, and sexual dimorphism of stature.
Related Documents Cite More By Author - Global human mandibular variation reflects differences in agricultural and hunter-gatherer subsistence strategiesvon Cramon-Taubadel, Noreen - Proceedings of the National Academy of Sciences, 2011 - 2 Hypotheses
The researchers test the relationship between global mandibular morphology variation and susbsistence economy, population history, geography, and climate. While some mandibular variation is significantly correlated with geography, the most significant relationship is with subsistence activity. The strength of the relationship leads the authors to speculate on how masticatory behavior might have affected jaw shape, either through stress, weaning behavior, or other demographic factors.
Related Documents Cite More By Author - Infantile stimulation and adult stature of human malesLandauer, Thomas K. - American Anthropologist, 1964 - 1 Hypotheses
In previous studies, researchers have observed an increased growth rate in rats that experienced stimulation during infancy. This study examines the relationship between stressful experiences during infancy and adult male stature in humans cross-culturally. Results suggest a strong positive relationship between infant stress and adult male stature.
Related Documents Cite More By Author - Human milk immune factors, maternal nutritional status, and infant sex: The INSPIRE studyCaffé, Beatrice - American Journal of Human Biology, 2023 - 1 Hypotheses
The Trivers-Willard hypothesis posits that concentrations of human milk immune factors vary with maternal condition (maternal diet diversity and body mass index) and the sex of the infant. Using linear mixed-effects models to analyze 358 milk samples from 10 international sites, the authors find minimal support for the Trivers-Willard hypothesis; only one immune factor, IgG, exhibited a significant relationship.
Related Documents Cite More By Author - A Cross-Cultural Nutrition Survey of 118 Societies, Representing the Major Cultural and Geographic Areas of the WorldWhiting, Marjorie Grant - , 1958 - 22 Hypotheses
Dietary variation has been implicated in population-level heath outcomes such as adult height and infant health. Here the author investigates these relationships in a sample of 118 nonindustrial societies, providing a comparative and quantitative assessment of nutrition and health cross-culturally.
Related Documents Cite More By Author - A cross-cultural investigation into the sexual dimorphism of statureWolfe, Linda D. - Sexual Dimorphism in Homo sapiens: A Question of Size, 1982 - 3 Hypotheses
This article examines height and sexual dimorphism of stature from a sociobiological perspective. Diet, child rearing, and marriage practices are tested as possible factors contributing to height sexual dimorphism of stature. Results provide some support for a nutritional hypotheses, but sexual selection and parental investment are not statistically significant.
Related Documents Cite More By Author - Human variation in the shape of the birth canal is significant and geographically structuredBetti, Lia - Proceedings of the Royal Society B, 2018 - 5 Hypotheses
The 'obstetrical dilemma' postulates that human females evolved a pelvis shape that was a compromise between the needs of bipedal locomotion and the need for a wider pelvic opening. The implication is that the female pelvis should be similar across the world. Researchers examine the size and shape of the birth canal of female individuals in the Goldman and Human Origin datasets. Contrary to the 'obstetrical dilemma,' the findings reveal that there is indeed significant geographical variation in size and shape of the female birth canal. Neutral evolutionary processes, particularly genetic drift, were suggested to be influential in female canal shape whereas the predicted effects of climate on canal diversity were only minimal.
Related Documents Cite More By Author - Sexual dimorphism in stature and women's work: a phylogenetic cross-cultural analysisHolden, Clare - American Journal of Physical Anthropology, 1999 - 3 Hypotheses
This article presents a phylogenetic approach to studying sexual dimorphism of stature. Results show a significant association between sexual division of labor and sexual dimorphism of stature.
Related Documents Cite More By Author - Mother-infant separation and physical growthGunders, Shulamith - Ethnology, 1968 - 1 Hypotheses
This study examines the relationship between adult male height and mother-infant separation. Results indicate that males who are separated from their mothers briefly during infancy are taller in adulthood than those who are not.
Related Documents Cite More By Author