This article explores the impact of social influence on entrepreneurial intention by drawing on the Theory of Planned Behavior and group polarization mechanisms. Through an experimental study involving 60 students divided into homogeneous and mixed-gender groups, the research examines how collective dynamics alter initial intentions to start a business. The findings reveal a significant decrease in entrepreneurial intention among female-only groups, a relative stability among male groups, and an increase within mixed-gender groups. These differences are interpreted in light of cognitive biases such as the halo effect and perceived social norms. The study highlights the importance of group composition and authority figures in entrepreneurship training programs, while emphasizing the need to consider gender-related factors in promoting entrepreneurial engagement.