ABSTRACT
The practical application of psychology has certain well-defined spheres. Its bearing upon education has long been recognised, and much valuable work done in relation to the study of the child mind. The psychology of fatigue, in relation to industrial efficiency, has also found recognition as a branch of applied science not without its practical value. A psychology which bases its philosophy upon a return to the primitive, especially if that psychology undertakes the solution of human problems, individual or collective, is ignoring the data of evolution. Geology, zoology, sociology, and comparative psychology, all show us the evolution of that which is simple into that which is complex, from the cave man, with his few needs and problems, to the complications of a modern industrial society. Diagnostic and descriptive psychology must be distinguished from remedial psychology of which we have had all too little.
