BIS-11
Impulsiveness Scale - 11 (Patton, Stanford, & Barratt, 1995) measures impulsivity through a 30-item self-report questionnaire. Items have to be answered on a 4-point scale, with higher total scores reflecting higher levels of impulsivity. Only total score on the BIS-11 was included in analyses. Patton et al. (1995) reported that the BIS-11 has high internal consistency.