Normal Changes in the Mental Abilities of Adults as Age Advances

Abstract

It is generally recognized that the capacity to grasp new ideas and learn new methods of work depends partly upon a person's intelligence and partly upon his age. It is also recognized that over-taxing a person's capacity to acquire new methods of work, or inadequate opportunities for a person to develop the capacity he possesses, are sources of dissatisfaction, mental strain, and sometimes physical complaints amongst normally healthy people. There is even reason to believe that amongst less healthy people they contribute towards disaffection and illness.