The restriction of studies of human intellect and character to studies of conscious states was not without influence on a scientific studies of animal psychology.

Dogs get lost hundreds of times and no one ever notices it or sends an account of it to a scientific magazine.

Psychology is the science of the intellects, characters and behavior of animals including man.

To the intelligent man with an interest in human nature it must often appear strange that so much of the energy of the scientific world has been spent on the study of the body and so little on the study of the mind.

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.

Human education is concerned with certain changes in the intellects, characters and behavior of men, its problems being roughly included under these four topics: Aims, materials, means and methods.

All that exists, exists in some amount and can be measured.