Brief psychotic disorder is defined by the presence of how many psychotic symptoms?

Brief psychotic disorder is characterized by the presence of one or more psychotic symptoms, which can include delusions, hallucinations, disorganized speech, or grossly disorganized or catatonic behavior. To meet the criteria for a diagnosis, at least one of these symptoms must be present for a significant portion of a day, lasting more than a day but less than one month, with eventual full return to premorbid functioning. This makes the identification of just one psychotic symptom sufficient for establishing the diagnosis of brief psychotic disorder, aligning with the definition that emphasizes a brief duration alongside acute onset. The presence of only one symptom simplifies the recognition and classification of this disorder, distinguishing it from other psychotic disorders that may require more symptoms or a longer duration.