Warning - Side effects of dissociation include:
1) out-of-body experience
2) feeling like you're a different person
3) feeling little to no pain
That one's my favorite
Dissociation strikes me as the most "forced" compliance. And with such an override comes stupidity. It's basically striping away the person who was there and replacing them with a dumbed-down puppet. I can only imagine that enough of that eventually starts permanently damaging the host's lucidity. There's a similar dynamic with the Reapers of Mass Effect. (The fast method will reduce the victims to a drooling vegetable within weeks. In the slower process leaves marks, but doesn't kill the mind entirely.)
Kindof reminds me of Focus Mode in Wetware. Internal monologue is muted, making the subject highly susceptible to suggestion. I'd imagine the wearer would still subconscious remember what happened, leading to submissive feelings even when the collar's inactive.