Question: Which of the following is not a diagnostic criterion for Delusional Disorder? Criterion A for Schizophrenia has never been met. The presence of one or more delusions with a duration of one month or longer Hallucinations are prominent, and are not related to delusional theme. Apart from the impact of the delusion(s) or its ramifications, functioning is not markedly impaired, and behavior is not obviously bizarre or odd. Need Assignment Help?