Problem
A middle-aged bank manager has a history of alcohol abuse. One day, he wakes up in hotel room 500 miles from his home, with no knowledge of how he got there. In the hotel closet, he finds a uniform for a fast-food burger restaurant that has a name tag with his name on it. The man has no memory of how he got there, or what led up to the abrupt changes in his life. This may be an example of which psychological disorder?