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[Alcohol outcome expectancies questionnaire (CERCA): psychometric properties in inpatients for addictions in Mexico].

Alcohol expectancies are the anticipations that a person makes to the effects that this substance will cause. This construct has proven to be useful in explaining alcohol consumption; however they have been scarcely measured in clinical population. The aim of this study was to develop and evaluate the psychometric properties of a test measuring these expectations in Mexican people with severe alcohol consumption under inpatient treatment. The final version of the test has a high Cronbach's alpha (.857) with three factors with a theoretical foundation explaining 61.5% of the variance: these properties are superior to those shown by other evidence. For future studies is suggested to include a greater number of women in the sample in order to confirm its psychometric properties.