Encephalization - Encephalization Quotient

Encephalization Quotient

In Snell's equation of simple allometry "E" is the weight of the brain, "C" is the cephalization factor and "S" is body weight and "r" is the exponential constant. The exponential constant for primates is 0.28 and either 0.56 or 0.66 for mammals in general.

The "Encephalization Quotient" (EQ) is the ratio of "C" over the expected value for "C" of an animal of given weight "S".