Adapted from the Vanderbilt Rating Scales developed by Mark L. Wolraich, MD. Available at Brightfutures.org.
M Wolraich, W Lambert, M Doffing, L Bickman, T Simmons, K Worley. Psychometric Properties of the Vanderbilt ADHD Diagnostic Parent Rating Scale in a Referred Population. Journal of Pediatric Psychology. 28(8): 559-568 (2003).
https://www.brightfutures.org/mentalhealth/pdf/professionals/bridges/adhd.pdf