Final answer:
Dissociative identity disorder, also known as multiple personality disorder, is a psychological disorder characterized by the presence of multiple distinct identities or personality states.
Step-by-step explanation:
The disorder you are referring to is dissociative identity disorder, also known as multiple personality disorder. It is a psychological disorder characterized by the presence of two or more distinct and separate personality states, each with its own way of perceiving and interacting with the world. Individuals with this disorder may experience memory loss, identity confusion, and may exhibit different behaviors, thoughts, and emotions depending on the identity that is currently in control.