'Medical' questions ...
Does one with these symptoms/conditions/afflictions/whatever normally also experience hallucinations? An active imagination is one thing, but seeing things that aren't there is another. I appeal to the 'wide range' of those on the board to comment. And yes, I know this is a film, artistic license applies, and portraying 'imagination' is difficult, but ...
Example; after you've READ stores about Alice, have YOU ever SEEN Humpty Dumpty sitting on a wall?