Hey there Stahrgeyzer.

(Just my thoughts / opinions -- for whatever they are worth!) The "therapy-induced" theory of DID is not the prevailing theory among therapists and psychiatrists, but the people who push that theory are extremely loud and political. There is a lot of overlap in diagnostic symptoms between DID and a few other disorders because they are all related to serious trauma, so they do tend to go together, but that doesn't disprove the existence of dissociated identities. As a counter-point to what you excerpted above, you might try finding some of Colin Ross's videos on trauma or DID, such as if you are interested. He does talk about the overlap.

The super-quick rule I've heard about voices is -- if they are coming from outside your head, it's more a psychosis thing, if they are coming from inside your head, it's more a DID thing.

If you want to explore what's going on with these alters you may have inside, you might consider envisioning a beautiful and very safe place in your mind. Kind of like when people do relaxation exercises and imagine their "safe place," although if you do have DID, this may become (or may be added to) an "inner world" that would help you talk to the other people inside.

A video might be a bit intimidating, but you could ask them to write down their names, or draw you a picture, or leave a question on a sheet of paper (such as "What is your favorite food?" or "What kind of movies do you like?" or simply "Do you need anything?").