Understanding psychology can greatly aid candidates in the UPSC interviews, as it helps in managing stress and enhancing communication skills. Knowledge of psychological principles allows candidates to better understand the interviewers' perspectives and tailor their responses effectively. It aids in building rapport and projecting confidence during the interaction. Furthermore, self-awareness fostered by psychological insights can help candidates articulate their strengths, weaknesses, and motivations more convincingly. Mastering the nuances of human behavior through psychological knowledge also assists in navigating challenging questions.