Something that jumped out at me when I was reading a book about dissociative disorders (I was just reading it to study the history of the field; it was a pretty terrible book) was a claim the author made about attachment. He said that children who are abused by parents between ages 4 and 8 maintain an attachment to the perpetrator because they have a biological imperative to for survival, and because they're in "early Piagetian stages of development."

A lot of this stuff is just things various therapists have asserted on a theoretical basis without statistical evidence, but I thought that was interesting in light of this topic.

I had a friend who said they'd observed that HG+ people were more likely not to have an attachment to their abusive parents, or to be able to break it. I'd dearly love to see an actual study on this, but I'm not sure how it could be done.