Relative brain size: A critique of a new measure

An analysis of a relative brain size measuring technique proposed by Radinsky ('67) shows it to be inapplicable on lower taxonomic levels of primates. The relationship among foramen magnum area, total skeletal weight (a suggested index of body size) and cranial capacity are analyzed by a partial correlation technique. Results indicate that foramen magnum size is significantly associated with total skeletal weight through its relationship to cranial capacity.