Scientific Research

Confirming Druid's Accuracy, Sensitivity, and Utility

Effects of High Potency Cannabis on Psychomotor Performance in Frequent Cannabis Users



Cannabis and Cannabinoid Research


University of Colorado, Boulder; Washington State University; Impairment Science, Inc.


Karoly, H. C., Milburn, M. A., Brooks-Russell, A., Brown, M., Streufert, J., Bryan, A. D., Lovrich, N. P., DeJong, W., Bidwell, L. C. (2020)

Assessment of cognitive and psychomotor impairment, subjective drug effects, and blood THC concentrations following acute administration of oral and vaporized cannabis



Journal of Psychopharmacology (Submitted)


The Johns Hopkins University School of Medicine, Behavioral Pharmacology Research Unit


Spindle, T R., Martin, E., Grabenauer, M., Woodward, T., Milburn, M., & Vandrey, R. (2020)

An investigation of the DRUID® smartphone/tablet app as a rapid screening assessment for cognitive and psychomotor impairment associated with alcohol intoxication


Vision Development Rehabilitation, 5, 31-42


Richman, J.E., & May, S. (2019)

Why Druid Works

Research Using Druid

University of SydneyDr. Danielle McCartneyCBD and Driving Impairment
Yale UniversityDr. Godfrey PearlsonDRUID and driving
University of KentuckyDr. Shanna BabalonisAlcohol, opioids and cannabis
Johns Hopkins Medical InstituteDr. Kelly DunnOpioid impairment
Johns Hopkins Medical InstituteDr. Tory Spindle & Dr. Elise WeertsAlcohol and cannabis in combinations
Johns Hopkins Medical InstituteDr. Ryan VandreyDemonstration of proof of concept
UCLADr. Ziva D. CooperMedical Cannabis
Washington State UniversityDr. Nick LovrichGreen Labs; Frequent cannabis users study
Brown UniversityDr. Jane MetrikAlcohol consumption after cannabis

"... a novel mobile device application (the DRUID), was the most sensitive measure of impairment when compared to the other cognitive performance tasks administered (i.e., the DSST, DAT, and PASAT) as well as several common field sobriety tests (i.e., the WT, OLS and MRB).”

-Dr. Ryan Vandrey, The Johns Hopkins School of Medicine