Rushton and Jensen, 2005, report in their paper "30 Years of Research on Race Differences in Cognitive Ability", as published in Psychology, Public Policy and Law, that MRI studies of brain size correlate with intelligence. Adult Asians average 1 cubic inch more brain mass than Whites and Whites average 5 cubic inches more brain mass than Blacks. They state that race differences in brain size are present at birth; and larger brains contain more neurons and synapses to process information faster.