The most widely used self-report measure of impulsivity in experimental and clinical research. Covers attentional, motor, and non-planning facets. Used extensively in ADHD, substance use, and borderline personality disorder research.
Patton, J.H., Stanford, M.S., & Barratt, E.S. (1995). Factor structure of the Barratt Impulsiveness Scale. Journal of Clinical Psychology, 51(6), 768–774.
Free access to 2023+ psychometric scales at PsychScales