Answer :
Final answer:
Mr. Smith's behavior of leaving home unexpectedly, not recognizing a friend, and displaying a different demeanor likely indicates that he has Dissociative Fugue, a disorder characterized by memory loss and a change in identity.
Explanation:
The scenario presented in the question suggests that Mr. Smith could be experiencing Dissociative Fugue, which is one of the dissociative disorders. Dissociative Fugue is characterized by a sudden, unexpected travel away from home or one's customary place of work, with an inability to recall one's past, confusion about personal identity, or the adoption of a new identity. In this condition, the individual leaves behind their previous life, displaying a different demeanor, and may not even recognize acquaintances. This fits the description provided as Mr. Smith leaves his home, does not remember his friend, and behaves unlike his usual self. Dissociative Fugue is different from amnesia, where the individual typically retains their identity but forgets information about themselves or past experiences. It also differs from schizophrenia, dissociative identity disorder, and depersonalization, which have distinct symptoms and patterns of dissociation or altered perception of self.
