I was just discussing the argument on the case for Complex-PTSD, or C-PTSD. The argument goes to how far should this "new" classification should go or if it should be included at all. Some of the leading theorists say that personality disorders, PTSD, and dissociation belong on the same continuum and should be treated as such. I agree with this leading thesis and definition of, and yet lest agreed upon, nomenclature for trauma based disorders (TBD). I base this on scant research and mostly from my personal experiences, one of my recent articles describes this event as it pertains to PTSD and extreme dissociative states. I have this on my list of things to further research and write about.
C-PTSD does not necessarily need to be of multiple traumatic experiences (MTE), it depends on the degree to which the person was impacted. Many rape victims suffer from symptoms that could be classified as C-PTSD. The need for a broader PTSD spectrum of diagnosis comes from the fact that dissociation has a high prevalence in persons diagnosed with PTSD, most having experienced MTE. I see a compromise in not including persons with single experiences in a C-PTSD diagnosis in the DSM-V, which would be tragic as I suspect that this would exclude many rape victims.
Where do psychosis, dissociation, personality disorders, Acute Stress Disorder, Post-Traumatic Stress Disorders relate and how?
You are still thinking in linear terms concerning TBD. Take away all of the differing classifications,...now,...throw every TBD together, all of them. Somewhere along the way one leads to another and could possibly vacillate back and forth, which would explain why all TBD have the same symptoms but different clusters of symptomology for a definitive diagnosis (a wholly ineffective attempt to categorize).
Psychosis would be a temporary result of an extreme overload of anxiety or stressors triggered by some mitigating factor, a defense mechanism overload where a blending of fantasy and reality merge and explode into the conscious from the unconscious.
In my post "Relationship Between Dissociation and Identity," the triggering factor was the drugs (drug induced psychosis), the mitigating circumstances where feeling disowned or disemboweled in a place that once was my comfort zone (dissociation) and the blending of fantasy and reality was I had always wanted to be the center of attention hence my starring on a TV show (narcissistic personality disorder). All in one night, a smorgasbord of anxiety inducing defensive mechanisms relegated by past trauma, yeah!