The selection of a specific external criterion for validation is an important methodological consideration that influences the interpretation of the results. Since a common definition of cannabis-related problems does not exist, the current "gold standard" for assessing criterion validity is to evaluate the screening instruments against DSM-IV diagnosis of cannabis dependence [29]. Alternatively, it is possible to cross-validate screening instruments against broader concepts of problem use, like acute consequences or psychosocial problems related to cannabis consumption.
