Predictors of irrational thinking in regular slot machine gamblers.

Previous research has suggested that irrational thinking may play a central role in the maintenance of behavior in slot machine gambling (M. B. Walker, 1992b). The present study is an evaluation of the validity and predictors of irrational thinking in a sample of regular gamblers (N = 20) drawn from the general community. The results were generally consistent with earlier findings; 75% of gambling-related cognitions were found to be irrational. Irrationality was unrelated to the amount of money lost or won during sessions but was positively related to risk taking. The most common irrational cognitions included false beliefs concerning the extent to which outcomes could be controlled or predicted and the attribution of human qualities (personification) to gambling devices. Gender comparisons showed that women were more likely than men to personify the machines. The validity of the speaking-aloud approach and suggestions for future research are discussed.