The "illusion of control" affects a player’s betting behavior by leading them to believe they can influence outcomes in chance-based games. This cognitive bias often results in players placing larger or riskier bets, as they feel their actions or rituals, like choosing specific numbers or using certain betting patterns, will sway the results. This perceived control can also encourage players to keep betting after losses, thinking their "strategy" will eventually yield a win. The illusion of control can lead to overconfidence, increasing the likelihood of chasing losses and potentially resulting in higher financial risk.