Psychology MCAT Practice Exam 2025 – Complete All-in-One Guide to Ensure Your Success!

Dissociative identity disorder (DID) is characterized by the presence of two or more distinct personality states or an experience of possession, which involves an abnormal integration of consciousness. Individuals with DID may feel like they have multiple identities, each with its own pattern of perceiving, relating to, and thinking about the self and the environment. This fragmentation of identity can lead to disruptions in the sense of self, memory, and awareness, which are core components of consciousness.

In contrast, dissociative amnesia primarily involves memory loss related to specific events or personal information, rather than a full fragmentation of identity. Depersonalization/derealization disorder involves feelings of detachment from oneself or the environment but does not necessarily include the distinct identities found in DID. Oppositional defiant disorder is a behavioral disorder characterized by defiance and oppositional behavior towards authority, not involving dissociative symptoms or issues relating to consciousness.

Thus, dissociative identity disorder is the most accurate choice when considering the abnormal integration of the conscious experience.