Apparently, Hitler had undergone major transformations subsequent to being hospitalized there and after having been treated by a psychiatrist. (Coolidge, Davis, Segal) One of the factors which had influenced the experts into questioning Hitler's mental status has been that Hitler had troubles in making decisions.

During his last days, Hitler had expressed excessive paranoia by fearing that everyone had been lying to him and that there was a conspiracy created in order for his own men to deliver him into the hands of Germany's enemies. His restlessness was increased by the assassination attempt that had taken place not long before.

Psychologists that had analyzed Adolf Hitler had found several reasons for his supposed madness. Apart from considering his dead brother, his sexual deviances, his hospitalization in Pasewalk, some believe that Hitler had also been a creation of the German society of the time.

Reasons like alcohol or drug...

They might have influenced Hitler's thinking, but the results had been controversial. While the study-makers had not foun any proof linking Hitler to the abuse of drugs or alcohol, the results concerning his sexual preferences had been disturbing. Hitler seems to have been inclined in having homosexual tendencies, as the results of his posthumously personality test conducted by experts had shown. (Coolidge, Davis, Segal)
The specialists that have examined the case of Adolf Hitler were also inspired in diagnosing him by witnesses that had stayed with Hitler in the Berlin bunker during the last minutes of their Fuhrer's life.

Works Cited

Coolidge, Frederick, Davis, Felicia, Segal, Daniel. (2007) Individual Differences Research. Understanding Madmen: A DSM-IV Assessment of Adolf Hitler. Retrieved December 9, 2008, at http://www.liu.edu/cwis/cwp/library/workshop/citapa.htm