Which of the following is NOT a diagnostic criterion for major depressive disorder?

The presence of excessive sociability is not a diagnostic criterion for major depressive disorder. Instead, major depressive disorder is characterized by symptoms such as persistent sadness, loss of interest or pleasure in activities once enjoyed, and significant impairment in daily functioning.

Persistent sadness involves a feeling of emptiness or hopelessness that lasts most of the day, nearly every day. Loss of interest or pleasure is also crucial for diagnosis and refers to a marked reduction in interest in activities that were previously engaging or joyful. Additionally, the impact on daily function indicates how the depressive symptoms can hinder a person’s ability to work, socialize, or carry out routine tasks, solidifying the diagnosis. Excessive sociability, however, is contrary to the common presentation of such disorders, which typically involves social withdrawal rather than increased sociability. This distinction highlights why the option of excessive sociability does not belong in the criteria for major depressive disorder.