Edward Thorndike

The dog, on the other hand, has few or no ideas because his brain acts in coarse fashion and because there are few connections with each single process. ”

This growth in the number, speed of formation, permanence, delicacy and complexity of associations possible for an animal reaches its acme in the case of man. ”

The intellectual evolution of the race consists in an increase in the number, delicacy, complexity, permanence and speed of formation of such associations. ”