Impulsivity can be measured by self-administered questionnaires, e.g. Barratt's BIS-11 and Eysenck's IVE-7. Impulsive behaviors can be observed from children to elders and adolescents classically show a higher level of impulsivity. Nevertheless, scales have been developed for adults not adolescents or children. We present here a psychometrical analysis of the properties and structure of Dickman's Impulsivity Inventory in a sample of 200 adolescents hospitalized in a paediatric unit chiefly after a suicide attempt. Two factors are expected (Functional Impulsivity and Dysfunctional Impulsivity) although we have reported elsewhere that a third factor, named Cognitive Impulsivity following Barratt's conceptualisation of impulsivity, could be reliably extracted regardless of item format (i.e. dichotomic vs. polytomic).