American Board Of Psychiatry And Neurology (ABPN) Practice Exam

Intermittent explosive disorder (IED) is characterized by recurrent, sudden outbursts of impulsive, aggressive behavior that are disproportionate to any provocation, leading to significant distress or impairment in functioning. Individuals with IED often experience a sense of tension or arousal before the aggressive episodes, followed by relief after the outburst, which further confirms the impulsive nature of the aggression. The unpredictability and lack of premeditation associated with these episodes align with the diagnosis of IED, making it the most plausible explanation for the symptoms described. In contrast, conditions such as bipolar I disorder might involve aggression but typically within the context of manic or hypomanic episodes, which are episodic and more predictable in their course. Borderline personality disorder can also present with aggression; however, this behavior is often tied to emotional dysregulation and interpersonal conflicts rather than the more explosive and uncontrolled nature seen in IED. Antisocial personality disorder features persistent patterns of disregard and violation of the rights of others, with aggression being more calculated and manipulative rather than impulsive. Therefore, the characteristics of the aggression — impulsive, unpredictable, and out of proportion to the situation — strongly support a diagnosis of intermittent explosive disorder.