The psychology of competition influences behavior at the blackjack table by increasing pressure, encouraging risk-taking, and affecting decision-making. Players may become more aggressive, overestimate their abilities, or react emotionally to perceived challenges from others at the table. This competitive mindset can lead to impulsive choices, such as doubling down or betting more, as players try to outperform opponents, even though blackjack is primarily a game of skill against the dealer rather than other players.