"The Domain of Dissociation," a chapter by Etzel Cardena, pages 15- 31.
Cardena argues that the domain of dissociation can be thought of as a constellation, or a way of thinking about dissociation and its related problems. "Dissociation" means that two or more mental processes or contents are not associated or integrated. It is usually assumed that these dissociated elements should be integrated in conscious awareness, memory, or identity. Cardena proposes two subdivisions, a repression of memories and disassociation of memories as escape mechanisms. Repression is a defense against anxiety-triggering internal stimuli, while dissociation is a defense against external stimuli. However, dissociation involves particular alterations in phenomenal experience that are related to a disconnection or disengagement regarding the self and/or the environment. Certain "ecstatic" experiences cause an enhanced sense of contact with the surroundings and the self. Forgetting who you are, and other events and things are voluntary with dissociation. Often is the case that memories are triggered when a matched association is made in the subconscious. This is highlighted brilliantly in Spellbound, once again, with Ballentine's character.

We first see Ballentine in mental distress when Constance Peterson draws the shape of a pool they want to build at the asylum with a fork at the dinner table. He becomes angry with her drawing on the table cloth. We again see him react a similar way, when he is hugging Dr. Peterson when she is in her night robe that is white with black stripes. By now, it becomes clear to us that " the fake Edwardes" has his own mental problems. Whenever he sees a white object with black lines on it, he enters a state of intense stress. This is what Cardena wrote about above: dissociation. Because of repressed memories, he becomes highly uncomfortable at the sight of black lines on a white background. We later learn the black lines on white signify ski tracks on snow. This is where the real Edwardes fell off a cliff and died. This "ecstatic" experience was triggered by the environment they were in, in the form of black lines on white.