The Barratt Impulsiveness Scale-11 (BIS-11; Patton et al. 1995) is a self-report measure of impulsiveness and consists of 30 items; the items are answered on a four-point scale (rarely/never, occasionally, often, and almost always/always). For the present study, we used the total score. This summed score of all items determines the degree of impulsiveness, the higher the summed score, the higher the level of impulsiveness of the participant. The BIS-11 has good psychometric properties (Patton et al. 1995).
