For Supporters

Start with the "Understanding Dissociative Disorders" booklet by the mental health charity, Mind. Check out page 17 for tips on how to support a dissociative loved one!
International experts have put together an introduction to dissociation and an introduction to dissociative disorders. They also have a FAQ page on dissociation, which contains more clinical information and research.
Here is a primer on dissociation by a psychotherapist with DID! She has also created a primer on DID, an article on the signs & symptoms of DID, and what causes DID. Very informative stuff.
McLean Hospital has many resources on understanding DID, including interviews with experts & stories from patients. There is also a column for advice on supporting dissociative loved ones.

If you're unsure where to start, check out this masterlist of DID myths & misconceptions by the nonprofit Beauty After Bruises. It covers some excellent topics with plenty of sources if you're interested in research.
What about all the dissociative disorders? This article on 6 common dissociative disorder myths is pretty good, and medically reviewed by an expert.
Ever watched a movie or show that had a character with multiple personalities? You may be surprised to hear that the media gets almost nothing right about DID!
Read this statement from international experts on the movie "Split" by M. Night Shymalan.
This article by a psychotherapist with DID is one of my favorites. If you know nothing about DID, please read it. If you think you know everything about DID, pleaes read it.
If you're more interested in peer reviewed medical literature, check out this empirical examination of 6 DID myths from the Harvard Review of Psychiatry.
Is DID a fad? Is social media making teenagers think they have DID? Here's what Dr. Jamie Marich says: