The purpose of this study wasto examine the role of cognitive factors, such as superstition, locus of control, decision-making and unrealistic optimism,on gambling.Eighty-six subjects participated in this study. They were divided into four groups: non-players, social players, problem gamblers, and pathological gamblers. Groups were formed on the basis of South Oaks Gambling Screen Scale. Results showed that pathological gamblers group obtained a high superstition index. With reference to unrealistic optimism, gambler groupbelieved that they had a better chance of success compared to non-gamblers. They also showed a higher impulsivity index in decision making than non-gamblers. This study supports the idea that cognitive factors such as superstition, unrealistic optimism, impulsivity and external locus of control are involved in gambling
