| Feature | DID | OSDD-1a | | | :--- | :--- | :--- | :--- | | Distinct Alters | Yes | Yes (but less distinct; more like "ego states") | Yes (highly distinct) | | Amnesia | Yes (gaps in everyday memory, not just trauma) | Yes | None (or minimal) | | Identity Alteration | Marked discontinuity in sense of self | Marked discontinuity | Marked discontinuity |
OSDD-1b is a chronic dissociative disorder falling under the broader category of Other Specified Dissociative Disorder . It sits on the dissociative identity spectrum, closely related to Dissociative Identity Disorder (DID), but with one key distinction regarding amnesia. The Core Difference: DID vs. OSDD-1a vs. OSDD-1b To understand OSDD-1b, it helps to see the three related diagnoses: osdd-1b