The legitimacy of dissociative amnesia as a diagnosis is a subject of significant debate. Critics have pointed to a lack of empirical support, with some labeling it 'psychiatric folklore.' This skepticism is bolstered by evidence such as the absence of descriptions of the disorder in literature prior to 1800 and a sharp decline in scientific publications on the topic after a peak in the mid-1990s. In contrast, some research suggests the condition may simply be underdiagnosed. A study conducted at a psychiatric outpatient hospital, for example, found that nearly 10% of patients met the criteria for dissociative amnesia, implying that its prevalence might be higher than case studies suggest, especially within psychiatric populations.