Cranial capacity

Cranial capacity is the cubic capacity of the braincase estimated for the living by a formula based on head measurements. It is determined by filling the cranial cavity with some kind of material such as mustard seed or glass beads and then measuring the volume. Cranial capacity has little correlation to intelligence. In a study done by Sir Francis Galton at the University of Cambridge, it was determined that there was no measurable difference in cranial capacity vs. college test scores.