Complex sentence: Histrionic personality disorder (HPD) is defined by the American Psychiatric Association as a personality disorder characterized by a pattern of excessive attention-seeking emotions, usually beginning in early adulthood, including inappropriately seductive behavior and an excessive need for approval.
Split into simpler sentences: Histrionic personality disorder (HPD) is defined by the American Psychiatric Association as a personality disorder. This personalty disorder is characterized by a pattern of excessive attention-seeking emotions, usually beginning in early adulthood, including inappropriately seductive behavior and an excessive need for approval.