title: Brief communication: pelvic sexual dimorphism and relative neonatal brain size really are related.
abstract: Primate species in which the neonatal brain size is large relative to the birth canal tend to have more sexually dimorphic pelves: this is a classic comparative relation, discovered by Schultz and Leutenegger. The original work did not correct for phylogenetic nonindependence of the data points; it only partly corrected for body size; it used ratios in both variables, and the size of the female pubis featured in both x- and y-variables. A recent publication by Tague placed a question mark over the validity of the relation. I therefore retested it, correcting for all four statistical defects. A strongly significant statistical relation exists.
authors.affiliation: Department of Anthropology and Biology, Emory University, Atlanta, Georgia 30322, USA.
authors.forename: M
authors.initials: M
authors.lastname: Ridley
mesh_terms: D000717:Anatomy, Comparative / Q000379:methods*; D000818:Animals; D001824:Body Constitution; D001921:Brain / Q000033:anatomy & histology*; D002508:Cephalometry; D005260:Female; D000882:Haplorhini / Q000033:anatomy & histology*; D006801:Humans; D007231:Infant, Newborn; D016015:Logistic Models; D008297:Male; D008954:Models, Biological; D010387:Pelvimetry; D010388:Pelvis / Q000033:anatomy & histology*; D010802:Phylogeny; D012727:Sex Characteristics