The abbreviated version of the Barratt Impulsiveness Scale (ABIS): Psychometric analysis, reliable change indexes in clinical practice and normative data

Impulsivity is highly associated with psychopathology and dysfunctional behavior. An abbreviated Barratt Impulsiveness Scale (ABIS) was proposed as a validated, reliable and less time-consuming scale. We tested in a sample of adults, its psychometric properties and computed a reliable change index for clinical use. Internal consistency, test-retest stability suggested high reliability, while significant correlations with measures of psychiatric symptoms, and the original scale were evidence of validity. If a patient presents a change of 4 points between two applications of ABIS this indicates a reliable change, which can be used to evaluate the effect of patients' treatment or interventions.