Which of the following is a key feature of borderline personality disorder?

Borderline personality disorder (BPD) is characterized by a pervasive pattern of instability in interpersonal relationships, self-image, and affects, along with marked impulsivity. The hallmark of this condition lies in the fluctuations in how individuals perceive themselves and their relationships with others.

Specifically, individuals with BPD often experience intense and unstable relationships, swinging from idealization to devaluation of others. They may have a deep fear of abandonment, which can lead to frantic efforts to avoid real or imagined separation. Alongside this, impulsivity in various areas such as spending, sex, substance use, reckless driving, and binge eating is also commonly seen.

Both the instability in relationships and the impulsive behaviors significantly impact daily functioning and contribute to the emotional distress that people with BPD experience. Therefore, identifying these features is critical for diagnosis and appropriate intervention, making this choice the most accurate representation of key characteristics of borderline personality disorder.