Best Answer: St. Augustine (Florida) is the oldest continually occupied European settlement in the continental United States, only San Juan, Puerto Rico predates the city as the oldest settlement within the territory of the United States.
Finally in 1980 the American Psychiatric Association officially recognized multiple personality disorder as a genuine emotional illness. Today, MPD is a relatively popular diagnosis with 20,000 cases recorded between 1980 and 1990. Researchers currently believe that from 0.01-10% of the general population has this mental illness.
Gordon Allport is widely recognized as the founder of academic personality psychology, and his perspectives on the trait concept continue to be influential today. Following Allport, many contemporary trait psychologists theorize that traits are rooted in biological processes but shaped by life experiences.