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

Pair-bond instability (proxy measure being higher incidence of maternal half siblings) will be lower at higher latitudes, irrespective of subsistence mode. (2-3)

Test
Test Name	Support	Significance	Coefficient	Tail
Correlation	Supported	p<.05	-.22	`UNKNOWN`

Variables
Variable Name	Variable Type	OCM Term(s)
Absolute Latitude	`UNKNOWN`	Location
Maternal Sibling Fraction	`UNKNOWN`	Family Relationships

Related Hypotheses

Main Author	Published Year	Hypothesis	Supported	Variables Tested
Ellsworth, Ryan M.	2015	Pair-bond instability (proxy measure being higher incidence of maternal half siblings) will be greater where male contribution to subsistence is lower. (2)	Not Supported	2	Cite Related Hypotheses More By Author
Ellsworth, Ryan M.	2015	Pair-bond instability (proxy measure being higher incidence of maternal half siblings) will be greater in the absence of amassable, heritable resources. (3)	Not Supported	2	Cite Related Hypotheses More By Author
Ellsworth, Ryan M.	2015	Pair-bond instability (proxy measure being higher incidence of maternal half siblings) will be greater among partible paternity societies. (3)	Not Supported	2	Cite Related Hypotheses More By Author
Ember, Carol R.	2007	More father-infant sleeping distance will predict higher mating effort outside of the pair bond with both parents and offspring (108).	Not Supported	2	Cite Related Hypotheses More By Author
Quinlan, Robert J.	2007	Pair-bond stability will be positively associated with importance of male provisioning (153).	Partially supported	2	Cite Related Hypotheses More By Author