Spanish adaptation of the Barratt Impulsiveness Scale (BIS-11)

Background: The 11th version of the Barratt Impulsiveness Scale (BIS-11) is widely used to measure impulsiveness, an important behavioural trait. Unfo rtunately, there is no Spanish version of this instrument. Method: The adaptation process included: translation, back-translation, rev iew of both versions and administration of the resulting instrument to a bi lingual sample from the target population. This process permitted the asses sment of the equivalence between the English and Spanish version of the Bar ratt Impulsiveness Scale in three stages: Linguistic equivalence, Conceptua l equivalence and Scale equivalence. Results: The most important aspects of the adaptation: Linguistic equivalen ce, Conceptual and Scale equivalence are adequate in this Spanish version o f the BIS-11. Conclusion: This adaptation of the BIS-11 is ready to be used on Spanish sp eaking populations.