What is characterized by the presence of persistent non-bizarre delusions for over one month?

The condition characterized by the presence of persistent non-bizarre delusions for more than one month is known as Delusional Disorder. This diagnosis is defined by the occurrence of one or more delusions that persist despite evidence to the contrary. Non-bizarre delusions are those that involve situations that might occur in real life, such as being followed, poisoned, or deceived, but do not include bizarre content, which would be implausible in nature.

In Delusional Disorder, the delusions can significantly impact a person’s life, but other aspects of their functioning and behavior remain largely intact, aside from the delusions themselves. This contrasts with other conditions, where the delusions might be accompanied by other symptomatology that significantly disrupts functioning or has more complex presentations.

Considering the other options: Brief Psychosis involves sudden onset psychotic symptoms that last less than a month and often resolve completely, while Schizophrenia encompasses a broader range of symptoms, including delusions, hallucinations, disorganized speech, and negative symptoms, lasting at least six months. Mood Disorders, on the other hand, primarily involve disturbances in mood rather than the presence of isolated delusions. Thus, Delusional Disorder is the most accurate and specific diagnosis for