Comparative study of reproductive skew and pair-bond stability using genealogies from 80 small-scale human societies

American Journal of Human Biology • Published In 2015 • Pages: 1-8 •

By Ellsworth, Ryan M., Shenk, Mary K., Bailey, Drew H., Walker, Robert S.

Hypothesis

Partible paternal societies will have higher fractions of paternal half-siblings than singular paternity societies. (3)

Note

The extra-pair sexual relationships may destabilize marital unions due to jealousy and splitting of paternal investment.

Test
Test Name	Support	Significance	Coefficient	Tail
Correlation	Supported	p<.01	.64	`UNKNOWN`

Variables
Variable Name	Variable Type	OCM Term(s)
Paternal Sibling Fraction	`UNKNOWN`	`NONE`
Polygyny	`UNKNOWN`	`NONE`

Related Hypotheses

Main Author	Published Year	Hypothesis	Supported	Variables Tested
Alcorta, Candace Storey	1982	Island societies will tend to have high paternal involvement	Supported	2	Cite Related Hypotheses More By Author
Gaulin, Steven J.C.	1980	Agricultural societies will have higher paternal certainty than hunter-gatherer societies (230).	Not Supported	2	Cite Related Hypotheses More By Author
Šaffa, Gabriel	2022	Female premarital sex is more likely to be restricted in societies with higher direct paternal investment.	Not supported	2	Cite Related Hypotheses More By Author
Gray, J. Patrick	1981	Paternal discipline will be associated with curved line dominant art style (40).	Not Supported	2	Cite Related Hypotheses More By Author
Ellsworth, Ryan M.	2015	Male reproductive skew (proxy measure being incidence of paternal half-siblings) will be highest in horticultural societies in comparison to other subsistence modes. (2)	Partially supported	2	Cite Related Hypotheses More By Author