Which behavior exemplifies the narcissistic personality disorder?

Bragging about imagined achievements is a key behavior associated with narcissistic personality disorder. This trait reflects the individual's need for admiration and validation, often leading them to inflate their accomplishments and present an exaggerated sense of self-importance to others. Those with narcissistic personality disorder typically have an unstable self-image, which drives them to seek constant reassurance and recognition from their surrounding social environment. Their tendency to believe they are superior can manifest as boasting about non-existent or overstated successes, which is a hallmark of their narcissistic traits.

In contrast, the other behaviors listed do not align as clearly with narcissistic personality disorder. Flirting excessively with peers may reflect other personality traits or social behaviors but doesn’t directly relate to the core attributes of narcissism. Having a victim mentality can indicate various psychological issues, including some forms of personality disorders, but it is not specifically indicative of narcissism. Demonstrating self-doubt contradicts the assertive self-confidence associated with narcissistic individuals. Therefore, the behavior of bragging about imagined achievements most accurately exemplifies narcissistic personality disorder.