the timeline of personality theories
History of Personality Psychology. Personality psychology is the centerpiece of psychology as a whole, and it is with reference to individual persons that many of the most important theories, findings, and applications in psychology must be oriented (McAdams, 2009).First Period of Personality Psychology.he importance of this was the ability to measure and the impact on behavior could be observed. During this period grand theories of personality psychology established in the 1930s and 1940s were put to the side in order for more focus on controversies and problems which concerned personality measurement.