What is a defining feature of Borderline Personality Disorder?

A defining feature of Borderline Personality Disorder (BPD) is characterized by severe and unstable mood swings and tumultuous relationships. Individuals with BPD often experience intense emotional fluctuations that can quickly shift from feeling very happy to experiencing deep sadness or anger, leading to impulsive decisions and challenges in maintaining stable relationships. This instability is a hallmark of the disorder, which can create significant difficulties in interpersonal interactions and self-identity.

The other choices reflect characteristics that do not align with BPD. For instance, stable mood and self-image contradict the inherent instability associated with the disorder. Similarly, consistent behavior and reliability would be typical of more stable personality traits rather than the erratic nature seen in individuals with BPD. An intense focus and attention would not specifically define BPD either, as the disorder is more prominently marked by emotional instability and relational dysfunction. Thus, the severe and unstable mood swings and relationships accurately capture the core issues faced by individuals with Borderline Personality Disorder.