Dr. Cornelia Wilbur was an American psychiatrist known for her work in the field of multiple personality disorder, now referred to as dissociative identity disorder. She gained prominence in the 1970s for her treatment of Sybil, a patient whose case became widely known through the book and film titled "Sybil." Wilbur's approach combined psychotherapy with a focus on understanding the patient's traumatic past. Her work contributed to the recognition of dissociative disorders in psychiatry and sparked discussions about the complexities of human identity and trauma.