Cognitive bias is what causes people to behave irrationally. In gambling, such irrational behavior may result in huge disappointment for a player. Gambling terms are such, that you cannot rely on logic to guide you in the game. There is no logic because only masterminds are able to make predictions and derive probabilities while gambling. To all the rest, cognitive bias is more of a rule than an exception. Let’s take a look at some of the most common cognitive biases that affect gamblers.