When one dissociates, their mind separates it's functions ( knowing, tasting, feeling, hearing, seeing ) from an event such as abuse in any form ( verbal, physical, emotional, spiritual and/or sexual ) so they can deal with the abuse. When one dissociates, they usually form Parts /Alters (MPD/DID).

Reading a book and not noticing the things that are going around you is dissociation in a very mild form but in SRA it is taken to it's most severe stage.

In SRA, the coven purposely abuses the victim so they can create parts in them. The coven may force the survivor to watch someone being sacrificed and threaten them if they tell. The survivor then dissociates and may never remember it again until they go through deliverance and counseling.