Internal Restlessness Scale (Weyandt et al)

The BIS-11 is a 30-item self-report measure. Items are scored on a 4-point Likert scale from 1 (rarely/never) to 4 (almost always). Items are summed, and total scores represent total levels of impulsivity. Scores range from 30 to 120, with higher scores indicating higher levels of impulsivity.