Which psychiatric disorder is characterized by significant memory gaps related to personal information?

Dissociative Amnesia is specifically characterized by the inability to recall important personal information, typically following a traumatic or stressful event. This condition involves memory gaps that are not attributable to ordinary forgetfulness and can result in the loss of memories for specific events, personal history, or even a complete identity crisis.

In contrast, Dissociative Identity Disorder involves the presence of two or more distinct identities or personality states, which may have varying degrees of memory gaps, but the central feature is not just memory loss but the fragmentation of the self. Post-Traumatic Stress Disorder includes symptoms such as re-experiencing trauma, avoidance, negative changes in mood and cognition, and hyperarousal, rather than a primary deficit in memory. Generalized Anxiety Disorder primarily features excessive worry and anxiety about various aspects of life and does not focus on memory gaps. Therefore, the defining characteristic of Dissociative Amnesia is the significant memory loss related to personal information, affirming it as the correct answer.