ABSTRACT
I N o r d e r t o approach an answer to the problem of control and improvement of personality-whether the personality to be improved is one’s own, that of one’s children, or that of people in general-it is necessary to have some knowledge of cause and effect in this field. It is necessary to look into the factors that produce individual differences in personality, and to see what experiment and practical experience have revealed as to ways of changing personality. Though each individual is in a sense unique, each is not ‘a law unto him self’. The same causal laws operate in all people, even in the most eccentric and abnormal. If there were no general laws of personality the task of the psychological adviser would be hopeless. He must apply to one individual what he has learned from the study of other individuals and what he knows of the organism and its relations with the environment.
