The Post Traumatic Stress model does not explain etiology for for dissociative disorders and oversimplifies the relationship. Model is trauma based and there can be other cofounders that contribute to the manifestation of the disorder. It is unclear whether trauma is a direct or indirect cause. 

Michigan State University

Model proposed by Pierre Janet, emphasizes dissociation is a defense mechanism to cope from a traumatic event or stressor.There is a relationship between genetic predisposition and attachment styles.

Post Traumatic Stress Model

Lynn, S. J., Polizzi, C., Merckelbach, H., Chiu, C.-D., Maxwell, R., van Heugten, D., &amp; Lilienfeld, S. O. (2022). Dissociation and dissociative disorders reconsidered: Beyond sociocognitive and trauma models toward a transtheoretical framework. Annual Review of Clinical Psychology, 18(1), 259–289. https://doi.org/10.1146/annurev-clinpsy-081219-102424 

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