DID has always been an interesting idea. I have read the
chapter in the FAP book and thought it a very interesting
account. The view that the self at the time of the trauma not
being under private control, seems easy enough to test. Also,
I believe that the FAP account can be used to explain high
rates of malingering when they discuss "Other contingencies
may also help to maintain being someone else." I like to
think of the old line form the Howard the Duck movies, where
the guy is trannsformed and tell's Howard that he is someone
else. Howard looks at him and just says "Tell that to your
insurence company." As to DID, I guess I am a skeptic. I know
several old analysts who use to say that the real issue was
whn the person was stressed, they wuld naturally regress- as
do all people. Often then therapist encourage the person to
call this regressed state an alternate personality.

Any how, just my $.02. No worth much I know...Here is an
article that you might want to add to your reading list:

Phelps, B. J. (2001) Personality, Personality “Theory” and
Dissociative Identity Disorder: What Behavior Analysis Can
Contribute and Clarify. The Behavior Analyst Today, 2 (4),
325-332.

Joe