But is it size or is it neurons that we need to measure? Is it weight or circumference? Should encephalization quotients use total body weight or lean body mass? Should we correct for body size at all? How do you measure intelligence?
In 2005, psychologist Michael McDaniel evaluated studies that used brain-imaging and standard intelligence tests and found that unequivocally, bigger brains correlated with smarter people [source: McDaniel ].